Platinum(II) complex and processes for preparing the same

FIELD OF THE INVENTION
The present invention relates to novel platinum(II) complexes which show a potent anti-tumor activity with low toxicity and good solubility in water, processes for preparing the same, and an anti-tumor agent comprising said platinum(II) complex as an active ingredient. The present invention also relates to novel intermediates useful for the preparation of said platinum(II) complexes.
DESCRIPTION OF THE PRIOR ART
Platinum coordination complexes, cytotoxic agents first identified by Rosenberg and his coworkers in 1965, are fully documented in the literature (B. Rosenberg et al., Nature, 222, 385(1969)). One of the best known platinum coordination complexes is cis-dichlorodiammineplatinum(II), also known as cis-DDP or cisplatin. Cisplatin has proven to be effective on a variety of human cancers such as testicular, ovarian, bladder, and head and neck cancer; however, its serious dose-limiting toxicities include severe nephrotoxicity, myelosuppression, nausea and vomiting, and neurotoxicity, especially ototoxicity and peripheral neuropathy. Further, cisplatin is not very soluble in water and dissolves in water very slowly, which makes its intravenous administration difficult. Therefore, numerous cisplatin derivatives have been synthesized in a search for improved anti-cancer agents with reduced toxicity and improved water-solubility. However, no platinum coordination complex which meets these criteria has been developed.
For instance, U.S. Pat. No. 4,783,452 issued to A. H. Haines et al. discloses cisplatin-derived compounds, having the formula of: ##STR2## wherein both Y groups are either chloride or bromide; the two R groups are both methyl or one of them is hydrogen and the other is phenyl; and n is 1. Such compounds are stated to have potent anti-tumor activity, although they still have severe nephrotoxicity and poor water solubility problems.
SUMMARY OF THE INVENTION
A primary objective of the present invention is to provide novel platinum(II) complexes which have potent anti-tumor activities with low toxicity and good water-solubility, which are useful for the treatment of human cancers, represented by the formula of: ##STR3## wherein: R.sub.1 and R.sub.2, which may be the same or different, are a hydrogen atom or a C.sub.1-4 alkyl group, respectively, or jointly form a cycloalkane group together with a carbon atom attached thereto;
two Xs jointly form a group represented by the formula(a) or (b) as follows: ##STR4## wherein R.sub.3 is a hydrogen atom or a methyl group; R.sub.4 and R.sub.5, which may be the same or different, are a hydrogen atom or a C.sub.1-4 alkyl group, respectively, or jointly form a cyclobutane together with a carbon attached thereto; and, the absolute configurations at the respective chiral centers in the 4,5-bis(aminomethyl)-1,3-dioxolane moiety are (4R, 5R) or (4S, 5S) represented by: ##STR5##
Further, among the compounds of the formula(1), those with the two Xs which jointly form a group of the formula(a) in which R.sub.1 and R.sub.2 are different exist as one of the following stereoisomers represented by: ##STR6## The platinum complexes of the present invention comprise all of the above stereoisomers of the formulas(1a1) and (1a2) and mixtures thereof. For the purpose of the present invention, however, there will be made no distinction between the two isomers. For a mixture of said stereoisomers of formulas(1a1) and (1a2) is not readily separable; and it is believed that the two stereoisomers have an equivalent level of anti-tumor activity.
Another objective of the present invention is to provide processes for preparing said platinum(II) complexes of formula(1).
A further objective of the present invention is to provide novel intermediates useful for said processes and processes for preparing other upstream intermediates.
A still further objective of the present invention is to provide an anti-cancer agent comprising said platinum(II) complex as an active ingredient.
DETAILED DESCRIPTION OF THE INVENTION
The platinum(II) complexes of the formula(1) wherein the absolute configurations at the respective chiral centers in 4,5-bis(aminomethyl)-1,3-dixolane moiety are (4R, 5R), show more potent anti-tumor activity than the compounds having the (4S, 5S) moiety. Even among the (4R, 5R)-compounds, possessed with still further effective anti-tumor activity are those wherein R.sub.1 and R.sub.2 jointly form a cycloalkane such as a cyclopentane or cyclohexane group; those wherein R.sub.1 and R.sub.2 are both methyl or ethyl group; those wherein either R.sub.1 or R.sub.2 is an ethyl group and the other is a methyl group, or one of R.sub.1 and R.sub.2 is an ethyl or isopropyl group and the other is a hydrogen atom; and, those wherein two Xs jointly form the group of formula(a) wherein R.sub.3 is a hydrogen atom, or the group of formula(b) wherein both R.sub.4 and R.sub.5 is hydrogen.
Most of the compounds represented by formula(1) are soluble in water. Particularly, the compounds having the R.sub.1 group which is different from the R.sub.2 group show a better water-solubility; and the shorter the alkyl chain length of R.sub.1 or R.sub.2 group is, the higher their water-solubility is.
It is further important to note that, the compounds of formula(1) show very low nephrotoxicity.
Representative compounds of the present invention include:
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II);
(glycolato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis-(aminomethyl)-1'3'-dioxolane]}platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II); and
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II).
More preferred compounds include:
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II);
(glycolato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis-(aminomethyl)-1'3'-dioxolane]}platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II);
(glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane]platinum(II);
cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II)
cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II)
cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II)
cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II)
The platinum(II) complexes of formula(1) may be prepared by employing various methods; and among them, more preferred ones are described below.
The following Methods A and B may be employed for preparing the compounds of formula(1) wherein two Xs jointly form the group of formula(a), i.e., the compounds represented by the formula of: ##STR7## wherein R.sub.1, R.sub.2, R.sub.3 and the absolute configurations are the same as defined previously. ##STR8## wherein R.sub.1, R.sub.2, R.sub.3 and the absolute configurations are the same as defined previously, and Hal is a halogen atom.
In Method A, a dihalogenodiamine platinum(II) complex of formula(2) is reacted with a compound represented by the formula of (L)-R.sub.3 CHOHCOOH wherein R.sub.3 is H or CH.sub.3, i.e., glycolic acid (R.sub.3 .dbd.H) or L-lactic acid(R.sub.3 .dbd.CH.sub.3), and silver(I) oxide, in the equivalent ratio of from 1:0.5:0.5 to 1:5:5, to obtain the desired compound of formula(1a). The reaction may be advantageously carried out in an aqueous medium or a mixed medium of an aqueous solvent and an alcoholic solvent such as methanol and ethanol in a dark environment at a temperature between 0.degree. C. and 100.degree. C., preferably between 50.degree. C. and 70.degree. C., for about 1 hour to 3 days. ##STR9## wherein R.sub.1, R.sub.2, R.sub.3, the absolute configurations and Hal are the same as defined previously.
In Step 1 of Method B, a dihalogenodiamine platinum(II) complex of formula(2) is reacted with an aqueous silver nitrate solution, preferably in the molar ration of about 1:2, to obtain an aqueous solution of a diaquacomplex represented by formula(3), which is then converted to an aqueous solution of a compound represented by formula(4) through an anion-exchange resin. The reaction of the compound(2) with silver nitrate may be advantageously carried out in an aqueous medium in a dark environment at a temperature between 0.degree. C. and 80.degree. C. for about 20 minutes to 3 days. The anion-exchange resin used for converting the compound(3) to the compound(4) is generally an OH-type resin such as Amberlite IRA-400, Dowex I or Daiaion SA-10A.
Thereafter, in Step 2, the aqueous solution of the compound(4) obtained above is reacted with an acid and its salt represented by the formula of (L)-R.sub.3 CHOHCOOH and (L)-R.sub.3 CHOHCOONa wherein R.sub.3 is H or CH.sub.3, i.e., glycolic acid and sodium glycolate (R.sub.3 .dbd.H) or L-lactic acid and sodium L-lacate(R.sub.3 .dbd.CH.sub.3), preferably in the molar ration of 1:1:1 to 1:5:5, to obtain the desired compound of formula(1a). The reaction may be advantageously carried out in an aqueous medium in a dark environment at a temperature between 0.degree. C. and 100.degree. C., preferably 50.degree. C. and 70.degree. C., for about 1 hour to 3 days.
The following Methods C and D may be employed for preparing the compounds of formula(1) wherein two Xs jointly from the group of formula(b)m i.e., the compounds represented by the formula of: ##STR10## wherein R.sub.1, R.sub.2, R.sub.4, R.sub.5 and the absolute configurations are the same as defined previously. ##STR11## wherein R.sub.1, R.sub.2, R.sub.4, R.sub.5, the absolute configurations and Hal are the same as defined previously.
In Method C, a dihalogenodiamine platinum(II) complex of formula(2) is reacted with a silver salt of formula(5), preferably in the molar ratio of from 1:0.5 to 1:5, to obtain the desired compound of formula(1b). The reaction is advantageously carried out in an aqueous medium in a dark environment at a temperature between 0.degree. C. and 100.degree. C., preferably between 50.degree. C. and 70.degree. C., for about 1 hour to 3 days. ##STR12## wherein R.sub.1, R.sub.2, R.sub.4, R.sub.5, the absolute configurations and Hal are the same as defined previously, and M is a monovalent cation such as Na, K and the like.
In Step 1 of Method D, a dihalogenodiamine platinum(II) complex is reacted with a silver ion, for example, with 2 moles of silver nitrate per 1 mole of compound(2) or with 1 mole of silver sulfate per 1 mole of compound(2), to obtain an aqueous solution of a diaquacomplex represented by formula(3). The reaction is advantageously carried out in an aqueous medium at a temperature between 0.degree. C. and 80.degree. C. for about 1 hour to 3 days.
Thereafter, in Step 2, the aqueous solution of a diaquacomplex(3) obtained above is reacted with a compound of formula(6) to obtain the desired compound of formula(1b). The reaction is advantageously carried out in an aqueous medium at a temperature between 0.degree. C. and 100.degree. C. for about 1 hour to 3 days.
In the above described Methods A to D, in order to obtain a compound of formula(1) having the (4R, 5R) absolute configurations at the chiral centers in the 4,5-bis(aminomethyl)-1,3-dioxolane, the dihalogenodiamine platinum(II) complex of formula(2) having the corresponding (4R, 5R) configurations should be employed as a starting material. Similarly, in order to obtain a compound of formula(1) having the (4S, 5S) absolute configurations at the chiral centers, a dihalogenodiamine platinum(II) complex of formula (2) with the corresponding absolute configurations should be employed as a starting material.
The dihalogenodiamine platinum(II) complexes of formula (2) employed as starting materials in Methods A to D may be prepared as follows: ##STR13## wherein R.sub.1, R.sub.2, the absolute configurations, Hal and M are the same as defined previously.
As illustrated above, first, a readily prepared compound of formula(7) in accordance with the method described in J. Med. Chem., 7, 14(1964), i.e., threitol 1,4-bis(methanesulfonate), is reacted with an appropriate aldehyde, acetal, ketone or ketal, preferably in the presence of an acid catalyst such as methanesulfonic acid, concentrated sulfuric acid and the like, to obtain a 1,3-dioxolane-4,5-bis(methanesulfonate) of formula(8). The selection of said aldehyde, acetal, ketone or ketal is made according to the substituents R.sub.1 and R.sub.2. For examples, formaldehyde may be chosen when both R.sub.1 and R.sub.2 are hydrogens; acetaldehyde diethyl acetal when either R.sub.1 and R.sub.2 is a methyl group and the other is a hydrogen atom; propionaldehyde diethyl acetal when either R.sub.1 or R.sub.2 is a ethyl group and the other is a hydrogen atom; isobutylaldehyde when one of R.sub.1 and R.sub.2 is a isopropyl group and the other is a hydrogen atom; cyclopentanone when R.sub.1 and R.sub.2 jointly form cyclopentane together with the carbon atom attached thereto; or cyclohexanone when R.sub.1 and R.sub.2 jointly form cyclohexane together with the carbon atom attached thereto.
The compound of formula(8) thus obtained is reacted with an azide ion in N,N-dimethylformamide at a temperature between 20.degree. C. and 120.degree. C. for about 1 to 24 hours to obtain a 4,5-bis(azidomethyl)-1,3-dioxolane of formula(9).
Thereafter, said 4,5-bis(azidomethyl)-1,3-dioxolane of formula(9) is subjected to a reduction process to yield a 4,5-bis(aminomethyl)-1,3-dioxolane of formula(10) by using a conventional method such as reduction with hydrogen in the presence of palladium-charcoal or platinum(IV) oxide in an alcoholic medium under a pressure between 15 psi and 70 psi at a temperature between 0.degree. C. and 50.degree. C. for about 30 minutes to 1 day.
Finally, the compound of formula(10) is reacted with an equimolar amount of tetrahalogenoplatinate(II) salt represented by the formula of M.sub.2 Pt(Hal).sub.4 wherein M and Hal have the same meanings as defined previously, generally in an aqueous medium at a temperature between 0.degree. C. and 100.degree. C., preferably between 50.degree. C. and 70.degree. C. at an atmospheric pressure but preferably under a stream of an inert gas such as nitrogen or argon gas, to obtain the dihalogenodiamine platinum(II) complex of formula(2).
The compound of formula(8) may be prepared by using an alternative method, which comprises the following steps: ##STR14## wherein R.sub.1, R.sub.2, and the absolute configurations, are the same as defined previously, and R is a methyl or ethyl group.
In accordance with the above method, tartaric acid of formula(11) is reacted with methanol or ethanol in the presence an acid catalyst to obtain a tartaric acid diester of formula(12). The compound of formula(12) is reacted with an appropriate aldehyde, acetal, ketone or ketal, preferably in the presence of an acid catalyst such as methanesulfonic acid, concentrated sulfuric acid and the like, or phosphorus pentoxide(Tsuzuki, et al., Bull, Chem. Sco. Japan 15, 55(1940)), to obtain a 1,3-dioxolane-4,5-dicarboxylic acid diester of formula(13). Said appropriate aldehyde, acetal, ketone or ketal can be chosen according to the substituents R.sub.1 and R.sub.2, as previously illustrated. The compound of formula(13) is then reduced with lithium aluminum hydride(LAH) to obtain a 4,5-bis(hydroxymethyl)-1,3-dioxolane of formula(14). The compound of formula(14) is reacted with methanesulfonyl chloride in pyridine to obtain the 1,3-dioxolane-4,5-bis(methanesulfonate) of formula(8).
The compounds of formula(8), (9), (10) and (2) having the (4R, 5R) absolute configurations at the respective chiral centers in said 4,5-bis(aminomethyl)-1,3-dioxolane are obtainable from the starting compound of formula(7) or (11) existing as D-form, i.e., D-threitol 1,4-bis(methanesulfonate) or D-tartaric acid. Whereas the compound of formula(7) or (11) existing as L-form, i.e., L-threitol 1,4-bis(methanesulfonate) or L-tartaric acid yields the compounds of formula(8), (9), (10) and (2) having the (4S, 5S) configurations.
The intermediate compounds of formulas, (9), (10) and (2) obtained from the procedure described above are novel compounds excepting: as for the compounds of formula(9) wherein R.sub.1 and R.sub.2 are both methyl; and as for the compounds of formula(10) wherein R.sub.1 and R.sub.2 are both methyl.
The platinum(II) complexes of the present invention have improved pharmacological characteristics such as excellent anti-tumor activities, low nephrotoxicity and good solubility in water and the like; and, therefore, are useful as an anti-cancer agent.
The compounds of the present invention can be formulated by any of the known appropriate methods with a pharmaceutically acceptable carrier and, if necessary, an adjuvant. For oral administration, for instance, the compounds of the present invention can be formulated into a solid preparation such as tablets, pills, granules, powder, capsules and the like, or a liquid preparation such as solution, suspension, emulsion and the like. When the preparation is used for parenteral administration, the preparation is made in an injection formula, an intravenous drip infusion and the like. For the preparation of an injection formula, the compound is preferably dissolved in distilled water or an aqueous solution of a salt such as sodium chloride. For the preparation of an intravenous drip infusion, the compound may be dissolved in a suitable fluid therapy such as a physiological saline, a glucose-sodium chloride solution and the like.
The effective dosage of the compounds of the present invention may vary with the physical condition of the patients and the location and status of the tumors. In general, it has been shown advantageous to administer the active compounds in an amount of about 50 to 1000 mg per 1 m.sup.2 body surface area in order to achieve the desired result.

The present invention is further illustrated in the following Examples, which should not be taken to limit the scope of the invention.
The structure of the compounds(II) of the present invention was confirmed by various analytical methods such as infrared(IR) spectrometry, .sup.1 H NMR spectrometry, .sup.13 C NMR spectrometry, elemental analysis, fast atom bombardment mass spectrometry(FAB-MS) and the like.
EXAMPLE 1A
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) by Method A
A mixture of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II)(0.50 g, 0.86 mmol), glycolic acid(0.13 g, 1.71 mmol), and silver(I) oxide(0.40 g, 1.72 mmol) in water(30 ml) was stirred at 60.degree. C. overnight in the dark. The reaction mixture was cooled to a room temperature, filtered through a pad of celite, and the filtered residue was washed with a small volume of water. The filtrate and the washing were combined and concentrated under a reduced pressure to 5 ml, and purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with water as the mobile phase. The eluate was concentrated under a reduced pressure to a small volume and freeze-dried to give 0.198 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) as a white solid.
Yield: 57% IR(KBr): 3445, 3222, 3069 cm.sup.-1 (NH), 1645 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.2.87(m, 2H, 2 CHNH.sub.2), 3.38(m, 2H, 2 CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.59(m, 2H, 2 CH), 5.05 (s, 2H, OCH.sub.2 O) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.48.52, 48.82, 69.30, 79.49, 79.53, 95.42, 195.49 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =401(.sup.194 Pt, 33%), 402(.sup.195 Pt, 34%) and 403(.sup.196 Pt, 25%)
EXAMPLE 1B
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) by Method B
To a stirred suspension of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II)(0.50 g, 0.86 mmol) in water(15 ml) was added a solution of silver nitrate(0.29 g, 1.72 mmol) in water(15 ml). The mixture was heated at 60.degree. C. for 2 hours in the dark, cooled to a room temperature, filtered through a pad of celite, and the filtered residue was washed with a small volume of water. The filtrate and the washing were combined and concentrated under a reduced pressure to 10 ml and passed through a column of anion exchange resin Amberlite IRA-400(OH.sup.- type, 20 ml) with water as the eluent. To 30 ml of alkaline eluate were added glycolic acid(0.07 g, 0.92 mmol) and 1M aqueous solution of sodium glycolate(3.44 ml). The mixture was stirred at 60.degree. C. overnight in the dark, cooled to a room temperature, and concentrated under a reduced pressure to 5 ml. The concentrate was purified in the same manner as described in Example 1A to give 0.194 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II).
Yield: 56%
EXAMPLE 2A
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.13 g, 1.71 mmol) and silver(I) oxide(0.38 g, 1.64 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.149 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(9:1, v/v) as the mobile phase.
Yield: 42% IR(KBr):3430, 3142, 3085 cm.sup.-1 (NH), 1657 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.1.47(s, 6H, 2 CH.sub.3), 2.86(m, 2H, 2 CHNH.sub.2), 3.32(m, 2H, 2 CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.71(m, 2H, 2 CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.26.56, 49.36, 49.65, 69.27, 79.18, 111.35, 195.51 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =429(.sup.194 Pt, 33%), 430(.sup.195 Pt, 34%) and 431(.sup.196 Pt, 25%)
EXAMPLE 2B
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.28 g, 1.65 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with glycolic acid(0.06 g, 0.79 mmol) and sodium glycolate (3.3 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.161 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 2A.
Yield: 46%
Example 3A
Synthesis of (glycolato-O,O')[4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum (II) by method A
0.50 g(0.79 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) was reacted with glycolic acid(0.12 g, 1.58 mmol) and silver(I) oxide (0.37 g, 1.60 mmol) in a mixture of water(55 ml) and methanol(5 ml) in the same manner as described in Example 1A to give 0.243 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase.
Yield: 68% IR(KBr): 3409, 3211, 3143 cm.sup.-1 (NH), 1635 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.1.60-2.00(m, 8H, cyclopentyl), 2.86 (m, 2H, 2 CHNH.sub.2), 3.33(m, 2H, 2 CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.66(m, 2H, 2 CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.23.88, 37.11, 49.22, 49.50, 69.29, 79.05, 121.09, 195.51 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =455(.sup.194 Pt, 33%), 456(.sup.195 Pt, 34%) and 457(.sup.196 Pt, 25%)
Example 3B
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum (II) by Method B
0.50 g(0.79 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) was reacted with silver nitrate(0.27 g, 1.59 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with glycolic acid (0.06 g, 0.79 mmol) and sodium glycolate(3.2 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.178 g of (glycolato-O,O')[4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) as a white solid after purification in the same manner as described in Example 3A.
Yield: 50%
Example 4A
Synthesis of (glycolato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}-platinum(II) by Method A
0.50 g(0.77 mmol) of cis-diiodo{cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) was reacted with glycolic acid(0.12 g, 1.58 mmol) and silver(I) oxide(0.36 g, 1.55 mmol) in a mixture of water(110 ml) and methanol (10 ml) in the same manner as described in Example 1A to give 0.174 g of (glycolato-O,O'){cyclohexanespiro-2'[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase.
Yield: 48% IR(KBr): 3417, 3218, 3143 cm.sup.-1 (NH), 1634 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.1.34(br s, 2H, cyclohexyl), 1.54 (br s, 8H, cyclohexyl), 2.55(m, 2H, 2 CHNH.sub.2), 3.14(m, 2H, 2 CHNH.sub.2), 3.78 (s, 2H, CH.sub.2), 4.40(m, 2H, 2 CH), 4.93 (br s, 1H, NH), 5.15(br s, 2H, 2 NH), 5.24(br s, 1H, NH) .sup.13 C NMR(DMSO-d.sub.6): .delta.23.79, 24.83, 35.96, 36.00, 48.92, 48.96, 69.70, 78.17, 78.21, 109.43, 191.91 FAB-MS: (M+H).sup.+ =469(.sup.194 Pt, 33%), 470(.sup.195 Pt, 34%) and 471(.sup.196 Pt, 25%)
Example 4B
Synthesis of (glycolato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}-platinum(II) by Method B
0.50 g(0.77 mmol) of cis-diiodo{cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) was reacted with silver nitrate(0.26 g, 1.53 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with glycolic acid (0.06 g, 0.79 mmol) and sodium gylcolate(3.1 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.084 g of (glycolato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) as a white solid after purificiation in the same manner as described in Example 4A.
Yield: 23%
Example 5A
Synthesis of (glycolato-O,O')[4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.84 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.13 g, 0.17 mmol) and silver(I) oxide(0.39 g, 1.68 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.225 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(95:5, v/v) as the mobile phase.
Yield: 64% IR(KBr): 3451, 3213, 3139 cm.sup.-1 (NH), 1634 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.1.40(d, J=4.8 Hz, 3H, CH.sub.3), 2.87 (m, 2H, 2 CHNH.sub.2), 3.28(m, 1H, CHNH.sub.2), 3.39(m, 1H, CHNH.sub.2), 4.10(s, 2H, CH.sub.2) 4.64(m, 1H, CH), 4.71(m, 1H, CH, overlapped with HOD), 5.28(q, J=4.8 Hz, 1H, CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.19.51, 48.57, 48.73, 48.86, 49.05, 69.29, 78.82, 80.77, 102.70, 195.46 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =415(.sup.194 Pt, 33%), 416(.sup.195 Pt, 34%) and 417(.sup.196 Pt, 25%)
Example 5B
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.84 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.28 g, 1.65 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with glycolic acid(0.06 g, 0.79 mmol) and sodium glycolate(3.4 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.273 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 5A.
Yield: 78%
Example 6A
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.13 g, 1.71 mmol) and silver(I) oxide(0.38 g, 1.64 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.234 g of (glycolate-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pack C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(9:1, v/v) as the mobile phase.
Yield: 66% IR(KBr): 3431, 3132 cm.sup.-1 (NH), 1650 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.0.93(t, J=7.5 Hz, 3H, CH.sub.3), 1.72 (dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2 CH.sub.3), 2.88(m, 2H, 2 CHNH.sub.2), 3.29(m, 1H, CHNH.sub.2), 3.39(m, 1H, CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.61(m, 1H, CH), 4.68(m, 1H, CH, overlapped with HOD), 5.15(t, J=4.5 Hz, 1H, CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.7.89, 26.90, 48.65, 48.70, 48.94, 49.00, 69.28, 78.85, 80.57, 106.43, 195.48 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =429(.sup.194 Pt, 33 %), 430(.sup.195 Pt, 34%) and 431(.sup.196 Pt, 25%)
Example 6B
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.28 g, 1.65 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with glycolic acid(0.06 g, 0.79 mmol) and sodium glycolate(3.3 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.189 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 6A.
Yield: 54%
Example 7A
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.80 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) was reacted with gylcolic acid(0.12 g, 1.58 mmol) and silver(I) oxide(0.37 g, 1.60 mmol) in a mixture of water(55 ml) and methanol(5 ml) in the same manner as described in Example 1A to give 0.267 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(7:3, v/v) as the mobile phase.
Yield: 75% IR(KBr): 3425, 3218, 3143 cm.sup.-1 (NH), 1634 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.0.94(d, J=6.9 Hz, 6H, 2 CH.sub.3), 1.89 (m, 1H, CH(CH.sub.3).sub.2), 2.86(m, 2H, 2 CHNH.sub.2), 3.30(m, 1H, CHNH.sub.2), 3.39(m, 1H, CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.58(m, 1H, CH), 4.64 (m, 1H, CH, overlapped with HOD), 4.98(d, J=4.2 Hz, 1H, CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.16.69, 16.79, 32.02, 48.66, 48.72, 48.96, 49.02, 69.28, 78.97, 80.48, 109.26, 195.50 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =443(.sup.194 Pt, 33%), 444(.sup. 195 Pt, 34%) and 445(.sup.196 Pt, 25%)
Example 7B
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.80 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.27 g, 1.59 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with glycolic acid(0.06 g, 0.79 mmol) and sodium glycolate(3.2 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.102 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 7A.
Yield: 29%
Example 8
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II) by Method A
1.42 g(2.23 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.34 g, 4.46 mmol) and silver(I) oxide(1.03 g, 4.46 mmol) in a mixture of water(100 ml) and methanol(10 ml) in the same manner as described in Example 1A to give 0.616 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridgl with a mixture of water-methanol(6:4, v/v) as the mobile phase.
Yield: 60% IR(KBr): 3422, 3208 cm.sup.-1 (NH), 1640 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.0.91(t, J=7.2 Hz, 6H, 2 CH.sub.3), 1.73 (q, J=7.2 Hz, 4H, 2 CH.sub.2), 2.80-2.96 (m, 2H, 2 CHNH.sub.2), 3.29-3.42(m, 2H, 2 CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.71(m, 2H, 2 CH, overlapped with HOD) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =457(.sup.194 Pt, 33%), 458(.sup.195 Pt, 34%) and 459(.sup.196 Pt, 25%)
Example 9
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II) by Method A
1.22 g(1.96 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.30 g, 3.92 mmol) and silver(I) oxide(0.91 g, 3.92 mmol) in a mixture of water(90 ml) and methanol(10 ml) in the same manner as described in Example 1A to give 0.607 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase.
Yield: 70% IR(KBr): 3425, 3142 cm.sup.-1 (NH), 1645 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.0.92(t, J=6.6 Hz, 3H, CH.sub.3), 1.43(s, 3H, CH.sub.3), 1.75(q, J=6.6 Hz, 2H, CH.sub.2), 2.78-2.98(m, 2H, 2 CHNH.sub.2), 3.28-3.42(m, 2H, 2 CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.72 (m, 2H, 2 CH, overlapped with HOD) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.8.25, 24.66, 32.69, 49.42, 49.52, 69.27, 79.04, 79.64, 113.44, 195.44 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =443(.sup.194 Pt, 33%), 444(.sup.195 Pt, 34%) and 445(.sup.196 Pt, 25%)
Example 10
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane]platinum(II) by Method A
1.00 g(1.91 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.29 g, 3.82 mmol) and silver(I) oxide(0.89 g, 3.82 mmol) in a mixture of water(90 ml) and methanol(10 ml) in the same manner as described in Example 1A to give 0.470 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane] platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(5:5, v/v) as the mobile phase.
Yield: 56% IR(KBr): 3422, 3210, 3131 cm.sup.-1 (NH), 1630 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.0.94(t, J=7.2 Hz, 3H, CH.sub.3), 1.41(m, 2H, CH.sub.2), 1.68(m, 2H, CH.sub.2), 2.81-2.97 (m, 2H, 2 CHNH.sub.2), 3.23-3.34(m, 1H, CHNH.sub.2), 3.34-3.45(m, 1H, CHNH.sub.2), 4.10(s, 2H, CH.sub.2), 4.62(m, 2H, 2 CH, overlapped with HOD), 5.19(t, J=4.2 Hz, 1H, CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =443(.sup.194 Pt, 33%), 444(.sup.195 Pt, 34%) and 445(.sup.196 Pt, 25%)
Example 11
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane]platinum(II) by Method A
1.00 g(1.86 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.28 g, 3.72 mmol) and silver(I) oxide(0.86 g, 3.72 mmol) in a mixture of water (90 ml) and methanol(10 ml) in the same manner as described in Example 1A to give 0.257 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(5:5, v/v) as the mobile phase.
Yield: 30% IR(KBr): 3430, 3140, 3082 cm.sup.-1 (NH), 1653 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =457(.sup.194 Pt, 33%), 458(.sup.195 Pt, 34%) and 459(.sup.196 Pt, 25%)
Example 12
Synthesis of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane]platinum(II) by Method A
0.97 g(1.80 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane]platinum(II) was reacted with glycolic acid(0.27 g, 3.60 mmol) and silver(I) oxide(0.83 g, 3.60 mmol) in a mixture of water (90 ml) and methanol(10 ml) in the same manner as described in Example 1A to give 0.402 g of (glycolato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(5:5, v/v) as the mobile phase.
Yield: 49% IR(KBr): 3486, 3190, 3063 cm.sup.-1 (NH), 1645 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =457(.sup.194 Pt, 33%), 458(.sup.195 Pt, 34%) and 459(.sup.196 Pt, 25%)
Example 13A
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.86 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) was reacted with L-lactic acid (0.18 g of 85% solution in water, 1.72 mmol) and silver(I) oxide (0.40 g, 1.72 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.206 g of(L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(93:7, v/v) as the mobile phase.
Yield: 58% IR(KBr): 3426, 3209, 3132 cm.sup.-1 (NH), 1628 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.1.30(d, J=6.9 Hz, 3H, CH.sub.3), 2.89 (m, 2H, 2 CHNH.sub.2), 3.4(m, 2H, 2 CHNH.sub.2), 4.17(q, J=6.9 Hz, 1H, CHCH.sub.3), 4.60(m, 2H, 2 CH), 5.05(s, 2H, OCH.sub.2 O) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard .sup.13 C NMR(D.sub.2 O/DSS): .delta.22.62, 48.47, 48.82, 75.19, 79.53, 79.58, 95.43, 196.47 DSS(.delta.=-1.600 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =415(.sup.194 Pt, 33%), 416(.sup.195 Pt, 34%) and 417(.sup.196 Pt, 25%)
Example 13B
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.86 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) was reacted with silver nitrate (0.29 g, 1.72 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid(0.14 g of 85% solution in water, 1.29 mmol) and sodium lactate(3.44 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.085 g of (L-lactato-O,O')[(4R,5R)-4,5-bis-(aminomethyl)-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 13A.
Yield: 24%
Example 14A
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) was reacted with L-lactic acid(0.17 g of 85% solution in water, 1.64 mmol) and silver(I) oxide(0.38 g, 1.64 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.265 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(7:3, v/v) as the mobile phase.
Yield: 73% IR(KBr): 3419, 3216, 3131 cm.sup.-1 (NH), 1634 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.1.14(d, J=6.9 Hz, 3H, CH.sub.3), 1.37(s, 6H, 2 CH.sub.3), 2.66(m, 1H, CHNH.sub.2), 2.80(m, 1H, CHNH.sub.2), 3.18(m, 2H, 2 CHNH.sub.2), 3.68(q, J=6.9 Hz, 1H, CHCH.sub.3), 4.66(m, 2H, 2 CH), 6.16(br s, 1H, NH), 6.22(br s, 1H, NH), 6.48(br s, 2H, 2 NH) .sup.13 C NMR(DMSO-d.sub.6): .delta.21.33, 26.39, 48.01, 48.29, 66.91, 77.49, 77.94, 108.74, 180.70 FAB-MS: (M+H).sup.+ =443(.sup.194 Pt, 33%), 444(.sup.195 Pt, 34%) and 445(.sup.196 Pt, 25%)
Example 14B
Synthesis of (L-lactato-O,O')[(4R, 5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.28 g, 1.65 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid(0.13 g of 85% solution in water, 1.23 mmol) and sodium lactate(3.3 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.203 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 14A.
Yield: 56%
EXAMPLE 15A
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]-platinum(II) by Method A
0.50 g(0.79 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dixolane-2-spiro-1'-cyclopentane]platinum(II) was reacted with L-lactic acid(0.25 g of 85% solution in water, 2.36 mmol) and silver(I) oxide(0.55 g, 2.36 mmol) in a mixture of water(55 ml) and methanol(5 ml) in the same manner as described in Example 1A to give 0.175 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase.
Yield: 47% IR(KBr): 3413, 3207, 3143 cm.sup.-1 (NH), 1642 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =469(.sup.194 Pt, 33%), 470(.sup.195 Pt, 34%) and 471(.sup.196 Pt, 25%)
EXAMPLE 15B
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) by Method B
0.50 g(0.79 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) was reacted with silver nitrate(0.26 g, 1.54 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid(0.08 g of 85% solution in water) and sodium lactate(3.1 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.259 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) as a white solid after purification in the same manner as described in Example 15A.
Yield: 70%
EXAMPLE 16A
Synthesis of (L-lactato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) by Method A
0.50 g(0.77 mmol) of cis-diiodo{cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) was reacted with L-lactic acid(0.16 g of 85% solution in water, 1.54 mmol) and silver(I) oxide(0.36 g, 1.55 mmol) in a mixture of water(110 ml) and methanol(10 ml) in the same manner as described in Example 1A to give 0.223 g of (L-lactato-O,O')[cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(5:5, v/v) as the mobile phase.
Yield: 60% IR(KBr): 3425, 3219, 3137 cm.sup.-1 (NH), 1630 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =483(.sup.194 Pt, 33%), 484(.sup.195 Pt, 34%) and 485(.sup.196 Pt, 25%)
EXAMPLE 16B
Synthesis of (L-lactato-O,O'){cyclohexanespiro-2'-[(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) by Method B
0.50 g(0.77 mmol) of cis-diiodo[cyclohexanespiro-2'-{(4'R,5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) was reacted with silver nitrate(0.26 g, 1.53 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid(0.12 g of 85% solution in water, 1.15 mmol) and sodium lactate(3.1 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.176 g of (L-lactato-O,O'){cyclohexanespiro-2'-[(4'R, 5'R)-4',5'-bis(aminomethyl)-1',3'-dioxolane]}platinum(II) as a white solid after purification in the same manner as described in Example 16A.
Yield: 47%
EXAMPLE 17A
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.84 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) was reacted with L-lactic acid(0.018 g of 85% solution in water, 1.68 mmol) and silver(I) oxide(0.39 g, 1.68 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.207 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum (II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(9:1, v/v) as the mobile phase.
Yield: 57% IR(KBr): 3426, 3214, 3143 cm.sup.-1 (NH), 1623 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.1.30(d, J=6.9 Hz, 3H, CH.sub.3), 1.40(d, J=4.8 Hz, 3H, CH.sub.3), 2.88(m, 2H, 2 CHNH.sub.2), 3.30(m, 1H, CHNH.sub.2), 3.41(m, 1H, CHNH.sub.2), 4.17(q, J=6.9 Hz, 1H, CHCH.sub.3), 4.63(m, 1H, CH), 4.70(m, 1H, CH, overlapped with HOD), 5.28(q, J=4.8 Hz, 1H, CH) DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =429(.sup.194 Pt, 33%), 430(.sup.195 Pt, 34%) and 431(.sup.196 Pt, 25%)
EXAMPLE 17B
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane] platinum(II) by Method B
0.50 g(0.84 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.28 g, 1.65 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid (0.09 g of 85% solution in water, 0.84 mmol) and sodium lactate(3.4 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.275 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane] platinum(II) as a white solid after purification in the same manner as described in Example 17A.
Yield: 76%
EXAMPLE 18A
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) was reacted with L-lactic acid(0.26 g of 85% solution in water, 2.46 mmol) and silver (I) oxide(0.57 g, 2.46 mmol) in water(30 ml) in the same manner as described in Example 1A to give 0.267 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(8:2, v/v) as the mobile phase.
Yield: 73% IR(KBr): 3405, 3209, 3138 cm.sup.-1 (NH), 1636 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(D.sub.2 O/DSS): .delta.0.94(t, J=7.5 Hz, 3H, CH.sub.2 CH.sub.3), 1.30(d, J=6.9 Hz, 3H, CH.sub.3), 1.73(dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2 CH.sub.3), 2.88(m, 2H, 2 CHNH.sub.2), 3.31(m, 1H, CHNH.sub.2), 3.41(m, 1H, CHNH.sub.2), 4.17(q, J=6.9 Hz, 1H, CHCH.sub.3), 4.62(m, 1H, CH), 4.70(m, 1H, CH, overlapped with HOD), 5.15(t, J=4.5 Hz, 1H, CH). DSS(.delta.=0.015 ppm in D.sub.2 O) was used as the internal standard FAB-MS: (M+H).sup.+ =443(.sup.194 Pt, 33%), 444(.sup.195 Pt, 34%) and 445(.sup.196 Pt, 25%)
EXAMPLE 18B
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.82 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.27 g, 1.61 mmol), followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid(0.09 g of 85% solution in water, 0.82 mmol) and sodium lactate(3.3 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.279 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 18A.
Yield: 77%
EXAMPLE 19A
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method A
0.50 g(0.80 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) was reacted with L-lactic acid(0.26 g of 85% solution in water, 2.41 mmol) and silver(I) oxide(0.56 g, 2.41 mmol) in a mixture of water(55 ml) and methanol(5 ml) in the same manner as described in Example 1A to give 0.227 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) as a white solid after purification by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(7:3, v/v) as the mobile phase.
Yield: 62% IR(KBr): 3425, 3212, 3136 cm.sup.-1 (NH), 1634 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =457(.sup.194 Pt, 33%), 458(.sup.195 Pt, 34%) and 459(.sup.196 Pt, 25%)
EXAMPLE 19B
Synthesis of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method B
0.50 g(0.80 mmol) of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) was reacted with silver nitrate(0.27 g, 1.59 mmol) followed by passing the reaction mixture through a column of anion exchange resin Amberlite IRA-400, and then reacted with L-lactic acid(0.09 g of 85% solution in water, 0.82 mmol) and sodium lactate(3.2 ml of 1M aqueous solution) in the same manner as described in Example 1B to give 0.310 g of (L-lactato-O,O')[(4R,5R)-4,5-bis(aminomethyl-2-isopropyl-1,3-dioxolane]platinum(II) as a white solid after purification in the same manner as described in Example 19A.
Yield: 85%
EXAMPLE 20
Synthesis of cis-cyclobutane-1,1-dicarboxylato [(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum (II) by Method C
A suspension of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) (2.00 g, 3.4 mmol) and 1,1-cyclobutanedicarboxylic acid disilver salt(1.23 g, 3.4 mmol) in water(400 ml) was stirred at 60.degree. C. for 16 hours in the dark. The resulting silver iodide was filtered through a pad of celite and the filtrate was again filtered using a millipore filter(0.22 .mu.m). The filtrate was concentrated under a reduced pressure to 10 ml and the resulting white crystals were filtered to give 0.764 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II).
Yield: 46% IR(KBr): 3432, 3239, 3191, 3126 cm.sup.-1 (NH), 1634, 1590 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d.sub.6): .delta.14.85, 30.32, 47.75, 55.43, 78.37, 93.87, 177.30 Elemental analysis: Calcd. for C.sub.11 H.sub.18 N.sub.2 O.sub.6 Pt: C 28.15, H 3.87, N 5.97 (%) Found: C. 28.20, H 3.88, N 5.86 (%) FAB-MS: (M+H).sup.+ =469(.sup.194 Pt, 33%), 470(.sup.195 Pt, 34%) and 471(.sup.196 Pt, 25%)
EXAMPLE 21
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) by Method C
2.00 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.78 g of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II).
Yield: 48% Elemental analysis: Calcd. for C.sub.11 H.sub.18 N.sub.2 O.sub.6 Pt: C 28.15, H 3.87, N 5.97 (%) Found: C 28.10, H 3.83, N 5.80 (%) FAB-MS: (M+H).sup.+ =469(.sup.194 Pt, 33%), 470(.sup.195 Pt, 34%) and 471 (.sup.196 Pt, 25%)
EXAMPLE 22
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) by Method C
A suspension of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II)(1.00 g, 1.7 mmol) and 1,1-cyclobutanedicarboxylic acid disilver salt(0.60 g, 1.7 mmol) in water(170 ml) was stirred at 60.degree. C. for 16 hours in the dark. The resulting silver iodide was filtered through a pad of celite and the filtrate was again filtered using a millipore filter(0.22 .mu.m). The filtrate was concentrated under a reduced pressure to 30 ml and the concentrate was purified by using preparative HPLC on Delta Pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(8:2, v/v) as the mobile phase to give 0.446 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) as a white solid.
Yield: 55% IR(KBr): 3447, 3218, 3132 cm.sup.-1 (NH), 1634 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d.sub.6): .delta.14.82, 1949, 30.21, 30.39, 47.87, 47.98, 55.42, 77.61, 79.73, 100.44, 177.29 Elemental analysis: Calcd. for C.sub.12 H.sub.20 N.sub.2 O.sub.6 Pt: C 29.82, H 4.17, N 5.80 (%) Found: C 29.69, H 4.29, N 5.57 (%) FAB-MS: (M+H).sup.+ =483(.sup.194 Pt, 33%), 484(.sup.195 Pt, 34%) and 485(.sup.196 Pt, 25%)
EXAMPLE 23
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) by Method C
1.00 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolanep]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 22 to give 0.435 g of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II).
Yield: 54% Elemental analysis: Calcd. for C.sub.12 N.sub.20 N.sub.2 O.sub.6 Pt: C 29.82, H 4.17, N 5.80 (%) Found: C 29.68, H 4.25, N 5.70 (%) FAB-MS: (M+H).sup.+ =483(.sup.194 Pt, 33%), 484(.sup.195 Pt, 34%) and 485(.sup.196 Pt, 25%)
EXAMPLE 24
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method C
1.50 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.693 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) as colorless crystals.
Yield: 57% IR(KBr): 3446, 3189, 3072 cm.sup.-1 (NH), 1609 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d6): .delta.7.63, 14.79, 26.33, 30.27, 47.90, 47.98, 55.40, 77.70, 79.52, 104.08, 177.24 Elemental analysis: Calcd. for C.sub.13 H.sub.22 N.sub.2 O.sub.6 Pt: C 31.39, H 4.46, N 5.63 (%) Found: C 31.60, H 4.23, N 5.85 (%) FAB-MS: (M+H).sup.+ =497(.sup.194 Pt, 33%), 498(.sup.195 Pt, 34%) and 499(.sup.196 Pt, 25%)
EXAMPLE 25
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method C
1.50 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.680 g of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II).
Yield: 56% Elemental analysis: Calcd. for C.sub.13 H.sub.22 N.sub.2 O.sub.6 Pt: C 31.39, H 4.46, N 5.63 (%) Found: C 31.52, H 4.15, N 5.79 (%) FAB-MS: (M+H).sup.+ =497(.sup.194 Pt, 33%), 498(.sup.195 Pt, 34%) and 499(.sup.196 Pt, 25%)
EXAMPLE 26
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method C
1.30 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutane-dicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.586 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) as white crystals.
Yield: 55% IR(KBr): 3424, 3239, 3084 cm.sup.-1 (NH), 1616, 1587 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d.sub.6): .delta.14.86, 26.41, 30.29, 48.47, 55.44, 78.18, 108.32, 177.28 Elemental analysis: Calcd. for C.sub.13 N.sub.22 N.sub.2 O.sub.6 Pt: C 31.39, H 4.46, N 5.63 (%) Found: C 31.38, H 4.50, N 5.55 (%) FAB-MS: (M+H).sup.+ =497(.sup.194 Pt, 33%), 498(.sup.195 Pt, 34%) and 499(.sup.196 Pt, 25%)
EXAMPLE 27
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method C
1.30 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.573 g of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II).
Yield: 54% Elemental analysis: Calcd. for C.sub.13 N.sub.22 N.sub.2 O.sub.6 Pt: C 31.39, H 4.46, N 5.63 (%) Found: C 31.31, H 4.32, N 5.50 (%) FAB-MS: (M+H).sup.+ =497(.sup.194 Pt, 33%), 498(.sup.195 Pt, 34%) and 499(.sup.196 Pt, 25%)
EXAMPLE 28
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method C
1.50 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.63 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) as white crystals.
Yield: 51% IR (KBr): 3433, 3189, 3070 cm.sup.-1 (NH), 1608, 1593 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d.sub.6): .delta.14.80, 16.39, 16.44, 30.17, 30.37, 31.32, 47.83, 48.83, 55.41, 77.92, 79.48, 106.83, 177.24 Elemental analysis: Calcd. for C.sub.14 H.sub.24 N.sub.2 O.sub.6 Pt: C 32.88, H 4.73, N 5.48 (%) Found: C 33.12, H 4.39, N 5.35 (%) FAB-MS: (M+H).sup.+ =511(.sup.194 Pt, 33%), 512(.sup.195 Pt, 34%) and 513(.sup.196 Pt, 25%)
EXAMPLE 29
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method C
1.50 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) was reacted with 1,1-cyclobutane-dicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.57 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II).
Yield: 46% Elemental analysis: Calcd. for C.sub.14 H.sub.24 N.sub.2 O.sub.6 Pt: C 32.88, H 4.73, N 5.48 (%) Found: C 33.10, H 4.50, N 5.40 (%) FAB-MS: (M+H).sup.+ =511(.sup.194 Pt, 33%), 512(.sup.195 Pt, 34%) and 513(.sup.196 Pt, 25%)
EXAMPLE 30
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) by Method C
1.50 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.561 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) as a white powder.
Yield: 45% IR(KBr): 3445, 3190, 3085 cm.sup.-1 (NH), 1615 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d.sub.6): .delta.15.26, 23.30, 30.72, 36.58, 48.61, 55.84, 78.34, 118.69, 178.13 Elemental analysis: Calcd. for C.sub.15 H.sub.24 N.sub.2 O.sub.6 Pt: C 34.42, H 4.62, N 5.35 (%) Found: C 34.78, H 4.84, N 5.08 (%) FAB-MS: (M+H).sup.+ =523(.sup.194 Pt, 33%), 524(.sup.195 Pt, 34%) and 525(.sup.196 Pt, 25%)
EXAMPLE 31
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) by Method C
1.50 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.665 g of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II).
Yield: 54% Elemental analysis: Calcd. for C.sub.15 H.sub.24 N.sub.2 O.sub.6 Pt: C 34.42, H 4.62, N 5.35 (%) Found: C 34.78, H 4.56, N 5.20 (%) FAB-MS: (M+H).sup.+ =523(.sup.194 Pt, 33%), 524(.sup.195 Pt, 34%) and 525(.sup.196 Pt, 25%)
EXAMPLE 32
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II) by Method C
1.50 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II) was reacted with 1,1-cyclobutanedicarboxylic acid disilver salt in the same manner as described in Example 20 to give 0.510 g of cis-cyclobutane-1,1-dicarboxylato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II) as a white powder.
Yield: 41% IR(KBr): 3445, 3190, 3069 cm.sup.-1 (NH), 1607 cm.sup.-1 (C.dbd.O) .sup.13 C NMR(DMSO-d.sub.6): .delta.14.82, 23.32, 24.41, 30.26, 35.55, 48.60, 55.42, 77.84, 108.72, 117.24 Elemental analysis: Calcd. for C.sub.16 H.sub.26 N.sub.2 O.sub.6 Pt: C 35.76, H 4.88, N 5.21 (%) Found: C 35.71, H 4.53, N 5.05 (%) FAB-MS: (M+H).sup.+ =537(.sup.194 Pt, 33%), 538(.sup.195 Pt, 34%) and 539(.sup.196 Pt, 25%)
EXAMPLE 33
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II) by Method C
A suspension of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-3,4-dioxolane]platinum(II)(1.00 g, 1.72 mmol) and malonic acid disilver salt(0.55 g, 1.72 mmol) in water(150 ml) was stirred at 60.degree. C. for 16 hours in the dark. The resulting silver iodide was filtered through a pad of celite and the filtrate was again filtered using a millipore filter(0.22 .mu.m). The filtrate was concentrated under a reduced pressure to 10 ml and the resulting white crystals were filtered to give 0.498 g of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(9:1, v/v) as the mobile phase to give 0.104 g of an additional product.
Yield: 81% IR(KBr): 3481, 3243, 3172, 3048 cm.sup.-1 (NH), 1652, 1606 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.2.62(m, 2H, 2 CHNH.sub.2), 3.04(m, 2H, 2 CHNH.sub.2), 3.26(s, 2H, CH.sub.2), 4.41(m, 2H, 2 CH), 4.94(s, 2H, OCH.sub.2 O), 5.38(br s, 2H, 2 NH), 5.47(br s, 2H, 2 NH) .sup.13 C NMR(DMSO-d.sub.6): .delta.47.54, 50.22, 78.30, 93.86, 174.01 FAB-MS: (M+H).sup.+ =429(.sup.194 Pt, 33%), 430(.sup.195 Pt, 34%) and 431(.sup.196 Pt, 25%)
EXAMPLE 34
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II)(1.00 g, 1.68 mmol) was reacted with malonic acid disilver salt(0.53 g, 1.68 mmol) in water(150 ml) in the same manner as described in Example 33 to give 0.239 g of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(9:1, v/v) as the mobile phase to give 0.361 g of an additional product.
Yield: 81% IR(KBr): 3454, 3383, 3214, 3065 cm.sup.-1 (NH), 1643-1555 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.1.27(d, J=4.8 Hz, 3H, CH.sub.3), 2.60(m, 2H, 2 CHNH.sub.2), 2.94(m, 1H, CHNH.sub.2), 3.05(m, 1H, CHNH.sub.2), 3.26(s, 2H, CH.sub.2), 4.36(m, 1H, CH), 4.61(m, 1H, CH), 5.16(q, J=4.8 Hz, 1H, CH), 5.31(br s, 1H, NH), 5.48(br s, 3H, 3 NH) .sup.13 C NMR(DMSO-d.sub.6): .delta.19.54, 47.75, 47.81, 50.21, 77.50, 79.72, 100.44, 174.03 FAB-MS: (M+H).sup.+ =443(.sup.194 Pt, 33%), 444(.sup.195 Pt, 34%) and 445(.sup.196 Pt, 25%)
EXAMPLE 35
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[4R, 5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II)(1.00 g, 1.64 mmol) was reacted with malonic acid disilver salt(0.52 g, 1.64 mmol) in water(150 ml) in the same manner as described in Example 33 to give 0.242 g of cis-malonato-[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(7:3, v/v) as the mobile phase to give 0.430 g of an additional product.
Yield: 89% IR(KBr): 3447, 3214, 3120 cm.sup.-1 (NH), 1628 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.0.87(t, J=7.5 Hz, 3H, CH.sub.3), 1.58(dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2 CH.sub.3), 2.59(m, 2H, 2 CHNH.sub.2), 2.97(m, 1H, CHNH.sub.2), 3.08(m, 1H, CHNH.sub.2), 3.26(s, 2H, CH.sub.2), 4.33(m, 1H, CH), 4.57(m, 1H, CH), 5.00(t, J=4.5 Hz, 1H, CH), 5.29(br s, 1H, NH), 5.46(br s, 3H, 3 NH) .sup.13 C NMR(DMSO-d.sub.6): .delta.7.65, 26.35, 47.74, 47.84, 50.21, 77.65, 79.50, 104.12, 174.04 FAB-MS: (M+H).sup.+ =457(.sup.194 Pt, 33%), 458(.sup.195 Pt, 34%) and 459(.sup.196 Pt 25%)
EXAMPLE 36
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II)(0.70 g, 1.15 mmol) was reacted with malonic acid disilver salt(0.37 g, 1.15 mmol) in water(100 ml) in the same manner as described in Example 33 to give 0.259 g of cis-malonato-[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(7:3, v/v) as the mobile phase to give 0.206 g of an additional product.
Yield: 89% IR(KBr): 3445, 3207, 3107 cm.sup.-1 (NH), 1627 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.1.34(s, 6H, 2 CH.sub.3), 2.56(m, 2H, 2 CHNH.sub.2), 3.02(m, 2H, 2 CHNH.sub.2), 3.26(s, 2H, CH.sub.2), 4.45(m, 2H, 2 CH), 5.45(br s, 2H, 2 NH), 5.56(br s, 2H, NH) FAB-MS: (M+H).sup.+ =457(.sup.194 Pt, 33%), 458(.sup.195 Pt, 34%) and 459(.sup.196 Pt, 25%)
EXAMPLE 37
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II)(1.00 g, 1.57 mmol) was reacted with malonic acid disilver salt(0.50 g, 1.57 mmol) in water(200 ml) in the same manner as described in Example 33 to give 0.533 g of cis-malonato-[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II) as white crystals.
Yield: 70% IR(KBr): 3440, 3200, 3053 cm.sup.-1 (NH), 1611 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.0.84(t,J=7.2 Hz, 6H, 2 CH.sub.3), 1.59(q, J=7.2 Hz, 4H, 2 CH.sub.2), 2.55(m, 2H, 2 CHNH.sub.2), 3.05(m, 2H, 2 CHNH.sub.2), 3.25(s, 2H, CH.sub.2), 4.43(m, 2H, 2 CH), 5.38(br s, 2H, 2 NH), 5.50(br s, 2H, 2 NH) .sup.13 C NMR(DMSO-d.sub.6): .delta.7.77, 29.65, 48.33, 50.24, 78.63, 112.06, 174.01 FAB-MS: (M+H).sup.+ =485(.sup.194 Pt, 33%), 486(.sup.195 Pt, 34%) and 487(.sup.196 Pt, 25%)
EXAMPLE 38
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II)(1.00 g, 1.61 mmol) was reacted with malonic acid disilver salt(0.51 g, 1.61 mmol) in water(150 ml) in the same manner as described in Example 33 to give 0.324 g of cis-malonato-[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase to give 0.350 g of an additional product.
Yield: 89% IR(KBr): 3431, 3205, 3049 cm.sup.-1 (NH), 1612 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.0.87(d, J=6.6 Hz, 6H, 2 CH.sub.3), 1.75(m, 1H, CH(CH.sub.3).sub.2), 2.59(m, 2H, 2 CHNH.sub.2), 2.98(m, 1H, CHNH.sub.2), 3.09(m, 1H, CHNH.sub.2), 3.26(s, 2H, CH.sub.2), 4.31(m, 1H, CH), 4.55(m, 1H, CH), 4.80(d, J=4.5 Hz, 1H, CH), 5.31(br s, 1H, NH), 5.48(br s, 3H, 3 NH) FAB-MS: (M+H).sup.+ =471(.sup.194 Pt, 33%), 472(.sup.195 Pt,34%) and 473(.sup.196 Pt, 25%)
EXAMPLE 39
Synthesis of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II)(1.00 g, 1.57 mmol) was reacted with malonic acid disilver salt(0.50 g, 1.57 mmol) in water(250 ml) in the same manner as described in Example 33 to give 0.265 g of cis-malonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II). The mother liquor was purified by using prepavative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase to give 0.159 g of an additional product.
Yield: 56% IR(KBr): 3433, 3200, 3053 cm.sup.-1 (NH), 1613 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(DMSO-d.sub.6 /TMS): .delta.1.45-1.90(m, 8H, cyclopentyl), 2.55(m, 2H, 2CHNH.sub.2), 3.03(m, 2H, 2 CHNH.sub.2), 3.26(s, 2H, CH.sub.2), 4.41(m, 2H, 2 CH), 5.38(br s, 2H, 2 NH), 5.50(br s, 2H, 2 NH) FAB-MS: (M+H).sup.+ =483(.sup.194 Pt, 33%), 484(.sup.195 Pt, 34%) and 485(.sup.196 Pt, 25%)
EXAMPLE 40
Synthesis of cis-dimethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II)(1.00 g, 1.64 mmol) was reacted with dimethylmalonic acid disilver salt(0.57 g, 1.64 mmol) in water (150 ml) in the same manner as described in Example 33 to give 0.401 g of cis-dimethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(6:4, v/v) as the mobile phase to give 0.261 g of an additional product.
Yield: 83% IR(KBr): 3454, 3211, 3126 cm.sup.-1 (NH), 1650-1597 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =485(.sup.194 Pt, 33%), 486(.sup.195 Pt, 34%) and 487(.sup.196 Pt, 25%)
EXAMPLE 41
Synthesis of cis-dimethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II)(0.95 g, 1.53 mmol) was reacted with dimethylmalonic acid disilver salt(0.53 g, 1.53 mmol) in water (150 ml) in the same manner as described in Example 33 to give 0.113 g of cis-dimethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(5:5, v/v) as the mobile phase to give 0.457 g of an additional product.
Yield: 75% IR(KBr): 3449, 3216, 3130 cm.sup.-1 (NH), 1630 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =499(.sup.194 Pt, 33%), 500(.sup.195 Pt, 34) and 501(.sup.196 Pt, 25%)
EXAMPLE 42
Synthesis of cis-dimethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'cyclopentane]platinum(II)(1.00 g, 1.57 mmol) was reacted with dimethylmalonic acid disilver salt(0.54 g, 1.57 mmol) in water (150 ml) in the same manner as described in Example 33 to give 0.009 g of cis-dimethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100.ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol(5:5, v/v) as the mobile phase to give 0.503 g of an additional product.
Yield: 64% IR(KBr): 3454, 3218, 3131 cm.sup.-1 (NH), 1668-1652 cm.sup.-1 (C.dbd.O) FAB-MS: (M+H).sup.+ =511(.sup.194 Pt, 33%), 512(.sup.195 Pt, 34%) and 513(.sup.196 Pt, 25%)
EXAMPLE 43
Synthesis of cis-ethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) by Method C
cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane[platinum(II) (1.00 g, 1.64 mmol) was reacted with ethylmalonic acid disilver salt (0.57 g, 1.64 mmol) in water (150 ml) in the same manner as described in Example 33 to give 0.605 g of cis-ethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol (6:4, v/v) as the mobile phase to give 0.154 g of an additional product.
Yield: 95% IR(KBr): 3446, 3205, 3122 cm.sup.-1 (NH), 1648, 1635 cm.sup.-1 (C=O) FAB-MS: (M+H).sup.+ =485(.sup.194 Pt, 33%), 486(.sup.195 Pt, 34%) and 487(.sup.196 Pt, 25%)
EXAMPLE 44
Synthesis of cis-ethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) by Method C
cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) (0.95 g, 1.53 mmol) in water (150 ml) in the same manner as described in Example 33 to give 0.278 g of cis-ethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with water-methanol (5:5, v/v) as the mobile phase to give 0.169 g of an additional product.
Yield: 59% IR(KBr): 3448, 3202, 3126 cm.sup.-1 (NH), 1617 cm.sup.-1 (C=O) FAB-MS: (M+H).sup.+ =499(.sup.194 Pt, 33%), 500(.sup.195 Pt, 34%) and 501(.sup.196 Pt, 25%)
EXAMPLE 45
Synthesis of cis-ethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum (II) by Method C
cis-Diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane)platinum(II) (1.00 g, 1.57 mmol) was reacted with ethylmalonic acid disilver salt(0.54 g, 1.57 mmol) in water (150 ml) in the same manner as described in Example 33 to give 0.657 g of cis-ethylmalonato[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II). The mother liquor was purified by using preparative HPLC on Delta pak C18-100 .ANG. reverse-phase bonded silica cartridge with a mixture of water-methanol (5:5, v/v) as the mobile phase to give 0.036 g of an additional product.
Yield: 86% IR(KBr): 3448, 3197, 3092 cm.sup.-1 (NH), 1662 cm.sup.-1 (C=O) FAB-MS: (M+H).sup.+ =511(.sup.194 Pt, 33%), 512(.sup.195 Pt, 34%) and 513(.sup.196 Pt, 25%)
EXAMPLE 46
Synthesis of cis-cyclobutane-1,1-dicarboxylato[(4S, 5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II) by Method D
To a stirred suspension of cis-diiodo[(4S,5S)-4,5-bis (aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II) (2.00 g, 3.1 mmol) in water(100 ml) was added a solution of silver nitrate (1.05 g, 6.2 mmol) in water (15 ml). The mixture was heated at 60.degree. C. for 3 hours in the dark, cooled to a room temperature and filtered through a pad of celite. The filtrate was again filtered using a millipore filter (0.22 .mu.m). To this filtrate was added a solution of 1,1-cyclobutanedicarboxylic acid (0.45 g, 3.1 mmol) dissolved in 1N sodium hydroxide solution (6.2 ml). The mixture was heated at 60.degree. C. for 16 hours, concentrated under a reduced pressure to 10 ml and the resulting white powder was filtered to give 0.858 g of cis-cyclobutane-1,1-dicarboxylato[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II).
Yield: 52% Elemental analysis:
Calcd. for C.sub.16 H.sub.26 N.sub.2 O.sub.6 Pt: C 35.76, H 4.88, N 5.21 (%) Found: C 35.62, H 4.56, N 5.13 (%) FAB-MS: (M+H).sup.+ =537(.sup.194 Pt, 33%), 538(.sup.195 Pt, 34%) and 539(.sup.196 Pt, 25%)
The dihalogenodiamine platinum(II) complexes used as starting materials in the above Examples were synthesized in accordance with the following Preparative Examples, which are presented here for illustration purpose and not to limit the scope of the present invention.
Preparative Example 1
(1) Synthesis of 2,3-O-methylene-D-threitol 1,4-bis(methanesulfonate)
D-threitol 1,4-bis(methanesulfonate) was reacted with formaldehyde and concentrated sulfuric acid as described in J. Med. Chem., 7, 14 (1964) to yield 2,3-O-methylene-D-threitol 1,4-bis(methanesulfonate) in 61% yield.
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane
A mixture of 2,3-O-methylene-D-threitol 1,4-bis(methanesulfonate) (3.19 g, 11.0 mmol) and sodium azide (2.86 g, 44.0 mmol) in anhydrous N,N-dimethylformamide (15 ml) was heated at 100.degree. C. for 16 hours under a nitrogen atmosphere. The reaction mixture was cooled to a room temperature, diluted with water (20 ml) and extracted with ether (100 ml). The ethereal solution was washed with brine (20 ml), dried over anhydrous magnesium sulfate and evaporated to dryness under a reduced pressure. The crude product was purified by using flash column chromatography over silica gel with a mixture of ether-hexane (1:4, v/v) as the eluent to give 1.93 g of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane as a light yellow oil.
Yield: 95% [.alpha.].sub.D.sup.20 =+125.20.degree. (acetone) IR(neat): 2103 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.3.30-3.62(m, 4H, 2 CH.sub.2), 3.91-4.09(m, 2H, 2 CH), 5.08(s, 2H, OCH.sub.2 O) .sup.13 C NMR(CDCl.sub.3): .delta.51.64, 77.14, 95.37
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane
A solution of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane (1.93 g, 10.5 mmol) in ethanol (20 ml) was hydrogenated in the presence of 10% palladium on activated carbon (0.2 g) at 50 psi at 40.degree. C. for 2 hours. The reaction mixture was filtered through a pad of celite and evaporated to dryness under a reduced pressure to give 1.35 g of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane as a colorless oil.
Yield: 97% IR(neat): 3370, 3307 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.1.40(s, 4H, 2 NH.sub.2), 2.81-2.98(m, 4H, 2 CH.sub.2), 3.63-3.82(m, 2H, 2 CH), 5.01(s, 2H, OCH.sub.2 O) .sup.13 C NMR(CDCl.sub.3): .delta.43.81, 80.34, 94.34
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II)
To a stirred solution of potassium iodide (10.17 g, 61.2 mmol) in water (20 ml) was added a filtered solution of potassium tetrachloroplatinate(II) (4.24 g, 10.2 mmol) in water (150 ml) that was stirred at a room temperature for 40 minutes in the dark under a nitrogen atmosphere to obtain a black solution of potassium tetraiodoplatinate(II). 110 ml of water was placed in a flask and stirred at 60.degree. C. under a nitrogen atmosphere, and into this, the above obtained black solution of potassium tetraiodoplatinate(II) and a solution of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane(1.35 g, 10.2 mmol) in water(170 ml) were simultaneously added dropwise over 2 hours at a constant rate. After 1 hour, the yellow precipitate was collected filtration, washed sequentially with water, ethanol and ether, and dried thoroughly in vacuo to give 4.95 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II).
Yield: 83%
Preparative Example 2
(1) Synthesis of 2,3-O-methylene-L-threitol 1,4-bis(methanesulfonate)
L-threitol 1,4-bis(methanesulfonate) was reacted with formaldehyde and concentrated sulfuric acid as described in J. Med. Chem., 7, 14 (1964) to yield 2,3-O-methylene-L-threitol 1,4-bis-(methanesulfonate) in 63% yield.
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane
3.89 g of 2,3-O-methylene-L-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.38 g of (4S, 5S)-4,5-bis(azidomethyl)-1,3-dioxolane.
Yield: 96% [.alpha.].sub.D.sup.20 =-122.01.degree. (acetone)
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane
1.10 g of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 0.78 g of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane.
Yield: 99%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II)
0.78 g of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate (II) in the same manner as described in Preparative Example 1 to give 2.92 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane]platinum(II).
Yield: 85%
Preparative Example 3
(1) Synthesis of 2,3-O-ethylidene-D-threitol 1,4-bis(methanesulfonate)
D-threitol 1,4-bis(methanesulfonate) was reacted with acetaldehyde diethyl acetal and methanesulfonic acid as described in J. Med. Chem., 7, 14 (1964) to yield 2,3-O-ethylidene-D-threitol 1,4-bis-(methanesulfonate) in 95% yield.
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-methyl-1,3-dioxolane
4.28 g of 2,3-O-ethylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.59 g of (4R, 5R)-4,5-bis(azidomethyl)-2-methyl-1,3-dioxolane as a light yellow oil.
Yield: 93% [.alpha.].sub.D.sup.20 =+143.80.degree. (acetone) IR(neat): 2101 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.1.42(d, J=4.8 Hz, 3H, CH.sub.3), 3.24-3.63 (m, 4H, 2 CH.sub.2), 3.93-4.13(m, 2H, 2 CH), 5.24 (q, J=4.8 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.19.84, 51.76, 76.80, 77.96, 101.97
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane
2.52 g of (4R,5R)-4,5-bis(aziodmethyl)-2-methyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 1.80 g of (4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane as a semi-solid oil.
Yield: 97% IR(neat): 3375, 3304 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.1.37(d, J=4.8 Hz, 3H, CH.sub.3), 1.41(s, 4H, 2 NH.sub.2), 2.65-3.04(m, 4H, 2 CH.sub.2), 3.65-3.87 (m, 2H, 2 CH), 5.16(q, J=4.8 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.19.75, 43.76, 44.05, 80.16, 81.09, 100.35
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II)
1.70 g of (4R,5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 5.76 g of cis-diiodo[(4R, 5R)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 83%
Preparative Example 4
(1) Synthesis of 2,3-O-ethylidene-L-threitol 1,4-bis(methanesulfonate)
L-threitol 1,4-bis(methanesulfonate) was reacted with acetaldehyde diethyl acetal and methanesulfonic acid as described in J. Med. Chem., 7, 14 (1964) to yield 2,3,-O-ethylidene-L-threitol 1,4-bis-(methanesulfonate) in 96% yield.
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl)-2-methyl-1,3-dioxolane
4.99 g of 2,3-O-ethylidene-L-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 3.18 g of (4S, 5S)-4,5-bis(azidomethyl)-2-methyl-1,3-dioxolane.
Yield: 98% [.alpha.].sub.D.sup.20 =-140.70.degree. (acetone)
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane
2.38 g of (4S,5S)-4,5-bis(aziodomethyl)-2-methyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 1.75 g of (4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane.
Yield: 99%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II)
1.70 g of (4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 5.80 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-methyl-1,3-dioxolane]platinum(II).
Yield: 84%
Preparative Example 5
(1) Synthesis of 2,3-O-propionylidene-D-threitol 1,4-bis(methanesulfonate)
A mixture of D-threitol 1,4-bis(methanesulfonate)(1.80 g, 6.5 mmol), propionaldehyde(0.41 g, 7.1 mmol, 0.51 ml), anhydrous copper(II) sulfate(1.55 g, 9.7 mmol) and methanesulfonic acid(2 drops) in anhydrous toluene(30 ml) was stirred at a room temperature for 16 hours under a nitrogen atmosphere. Anhydrous potassium carbonate(0.3 g) was added to the reaction mixture and stirred for an additional 20 minutes. The reaction mixture was filtered, evaporated to dryness and oily residue was crystallized from a mixture of absolute ethanol and acetone to give 1.60 g of 2,3-O-propionylidene-D-threitol 1,4-bis(methanesulfonate) as colorless crystals.
Yield: 78% m.p.: 65.0.degree.-65.5.degree. C. IR(Nujol): 1357, 1179 cm.sup.-1 (O--SO.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.96(t, J=7.4 Hz, 3H, CH.sub.3), 1.71(dq, J=4.6 Hz, J=7.4 Hz, 2H, CH.sub.2), 3.09(s, 6H, 2 SO.sub.2 CH.sub.3), 4.09-4.29(m, 2H, 2 CH), 4.33(m, 4H, 2 CH.sub.2), 5.07(t, J=4.6 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.7.59, 26.89, 37.77, 67.78, 68.00, 75.18, 75.73, 106.38
Alternatively, 2,3-O-propionylidene-D-threitol 1,4-bis-(methansulfonate) may be prepared by the following method.
A mixture of D-tartaric acid(50.00 g, 0.333 mol) and concentrated sulfuric acid(5 ml) in absolute ethanol(500 ml) was heated at reflux for 15 hours. The reaction mixture was cooled to a room temperature and to it, aqueous 28% ammonium hydroxide solution(24 ml) was added, and the mixture was stirred for an additional 30 minutes. The white precipitate was filtered off and the filtrate was evaporated to dryness to give 56.09 g of diethyl D-tartrate as an oil.
Yield: 82% .sup.1 H NMR(CDCl.sub.3): .delta.1.33(t, J=7.2 Hz, 6H, 2 CH.sub.3), 3.28 (br s, 2H, 2 OH), 4.32(q, J=7.2 Hz, 4H, 2 CH.sub.2), 4.54(s, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.14.07, 62.36, 71.95, 171.47
A mixture of diethyl D-tartrate(4.00 g, 19.4 mmol), propionaldehyde(5.63 g, 96.9 mmol, 6.99 ml), anhydrous copper(II) sulfate(6.19 g, 38.8 mmol) and methanesulfonic acid(3 drops) in anhydrous toluene(60 ml) was stirred at a room temperature for 16 hours under a nitrogen atmosphere. Anhydrous potassium carbonate(0.30 g) was added to the reaction mixture and stirred for an additional 20 minutes. The reaction mixture was filtered, evaporated to dryness and the oily residue was purified by using flash column chromatography over silica gel with a mixture of ether-hexane(1:4, v/v) as the eluent to give 3.80 g of diethyl 2,3-O-propionylidene-D-tartrate as an oil.
Yield: 80% IR(neat): 1757, 1740 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(CDCl.sub.3): .delta.1.01(t, J=7.5 Hz, 3H, CH.sub.3), 1.32(t, J=7.2 Hz, 6H, 2 CH.sub.3), 1.81(dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2), 4.27(q, J=7.2 Hz, 2H, CH.sub.2), 4.28(q, J=7.2 Hz, 2H, CH.sub.2), 4.66(d, J=4.2 Hz, 1H, CH), 4.75(d, J=4.2 Hz, 1H, CH), 5.23(t, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.7.59, 14.04, 14.07, 26.64, 61.77, 61.79, 77.13, 77.25, 108.39, 169.09, 169.78
A suspension of lithium aluminum hydride(1.03 g, 27.2 mmol) in ether(25 ml) was refluxed for 30 minutes with vigorous stirring. A solution of diethyl 2,3-O-propionylidene-D-tartrate(5.28 g, 21.4 mmol) in ether(10 ml) was added dropwise without heating over 30 minutes, the heat of reaction causing a gentle refluxing. After additional heating for 5 hours, ethyl acetate(1.1 ml) was carefully added, and the reaction mixture was cooled to 0.degree.-5.degree. C. After successive cautious additions of water (0.9 ml), 4N NaOH(0.9 ml) and water(2.8 ml), the inorganic precipitate which had formed was removed by filtration, and extracted thoroughly with warm ethyl acetate(2.times.40 ml). The combined organic solution were dried over anhydrous MgSO.sub.4, evaporated to dryness and purified by using flash column chromatography over silica gel with a mixture of ethyl acetate and hexane (2:1, v/v) as the eluent to give 2.28 g of 2,3-O-propionylidene-D-threitol as an oil.
Yield: 66% IR(neat): 3385 cm.sup.-1 (OH) .sup.1 H NMR(CDCl.sub.3): .delta.0.98(t, J=7.5 Hz, 3H, CH.sub.3), 1.70(dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2), 3.34(br s, 2H, 2 OH), 3.62-3.88(m, 4H, 2 CH.sub.2), 3.88-4.05(m, 2H, 2 CH), 5.05(t, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.7.75, 27.13, 62.36, 62.46, 78.29, 79.04, 105.63
To a stirred solution of 2,3-O-propionylidene-D-threitol (2.18 g, 13.4 mmol) in pyridine(10 ml) was added methanesulfonyl chloride(3.80 g, 33.2 mmol, 2.57 ml) dropwise at 0.degree. C. and the mixture was stirred for 16 hours at a room temperature. The reaction mixture was poured into ice-water(20 ml) with vigorous stirring. The resulting precipitate was filtered, washed well with water and dried in vacuo. The crude product was crystallized from absolute ethanol to give 2.81 g of 2,3-O-propionylidene-D-threitol 1,4-bis(methanesulfonate).
Yield: 66% m.p.: 65.0.degree.-65.5.degree. C. IR(nujol): 1357, 1179 cm.sup.-1 (O--SO.sub.2)
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-ethyl-1,3-dioxolane
1.43 g of 2,3-O-propionylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 0.88 g of (4R,5R)-4,5-bis(azidomethyl)-2-ethyl-1,3-dioxolane as a light yellow oil.
Yield: 92% [.alpha.].sub.D.sup.20 =+127.88.degree. (acetone) IR(neat): 2102 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.98(t, J=7.5 Hz, 3H, CH.sub.3), 1.72(dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2), 3.34-3.54 (m, 4H, 2 CH.sub.2), 3.97-4.07(m, 2H, 2 CH), 5.07 (t, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.7.64, 27.09, 51.88, 51.94, 77.94, 105.86
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane
0.85 g of (4R,5R)-4,5-bis(azidomethyl)-2-ethyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 0.61 g of (4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane as a semi-solid oil.
Yield: 95% IR(neat): 3367 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.97(t, J=7.5 Hz, 3H, CH.sub.3), 1.36(s, 4H, 2 NH.sub.2, 1.68(dq, J=4.5 Hz, J=7.5 Hz, 2H, CH.sub.2), 2.75-3.00(m, 4H, 2 CH.sub.2), 3.70-3.80(m, 2H, 2 CH), 5.00(t, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.7.83, 27.19, 44.05, 44.33, 80.34, 81.11, 104.59
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II)
0.59 g of (4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 1.93 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 86%
Preparative Example 6
(1) Synthesis of 2,3-O-propionylidene-L-threitol 1,4-bis(methanesulfonate)
A mixture of L-threitol 1,4-bis(methanesulfonate)(4.00 g, 14.4 mmol), propionaldehyde diethyl acetal(19.00 g, 144.0 mmol, 23.3 ml) and methanesulfonic acid(2 drops) was heated at 70.degree. C. for 16 hours under a nitrogen atmosphere. The reaction mixture was cooled to 0.degree. C. with an ice bath and diluted with ether(100 ml). After standing for 1 hour at 0.degree. C., the ethereal solution was decanted and the residue was washed with a small volume of ether and then triturated with a small volume of absolute ethanol to give 3.80 g of 2,3-O-propionylidene-L-threitol 1,4-bis(methanesulfonate) as colorless crystals.
Yield: 83%
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl)-2-ethyl-1,3-dioxolane
1.39 g of 2,3-O-propionylidene-L-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 0.83 g of (4S,5S)-4,5-bis(azidomethyl)-2-ethyl-1,3-dioxolane.
Yield: 90% [.alpha.].sub.D.sup.20 =-127.54.degree. (acetone)
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane
0.73 g of (4S,5S)-4,5-bis(azidomethyl-2-ethyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 0.51 g of (4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane.
Yield: 93%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II)
0.51 g of (4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 1.63 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-ethyl-1,3-dioxolane]platinum(II).
Yield: 84%
Preparative Example 7
(1) Synthesis of 2,3-O-isopropylidene-D-threitol 1,4-bis(methanesulfonate)
5.04 g of 2,3-O-isopropylidene-D-threitol 1,4-bis(methanesulfonate) was produced in the same procedure as described in J. Med. Chem., 7, 14 (1964).
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2,2-dimethyl-1,3-dioxolane
5.04 g of 2,3-O-isopropylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 3.22 g of (4R,5R)-4,5-bis(azidomethyl)-2,2-dimethyl-1,3-dioxolane as a light yellow oil.
Yield: 96% IR(neat): 2110 cm.sup.-1 (N.sub.3)
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane
3.22 g of (4R,5R)-4,5-bis(azidomethyl)-2,2-dimethyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 2.40 g of (4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane as an oil.
Yield: 99% IR(neat): 3370, 3306 cm.sup.-1 (NH.sub.2)
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II)
2.40 g of (4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 8.05 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 88%
Preparative Example 8
(1) Synthesis of 2,3-O-isopropylidene-L-threitol 1,4-bis(methanesulfonate)
3.30 g of 2,3-O-isopropylidene-L-threitol 1,4-bis(methanesulfonate) was produced by the same procedure as described in J. Med. Chem., 7, 14 (1964).
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl)-2,2-dimethyl-1,3-dioxolane.
3.30 g of 2,3-O-isopropylidene-L-threitol 1,4-bis-(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.18 g of (4S,5S)-4,5-bis(azidomethyl)-2,2-dimethyl-1,3-dioxolane.
Yield: 99%
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane
2.11 g of (4S,5S)-4,5-bis(azidomethyl)-2,2-dimethyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 1.53 g of (4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane.
Yield: 96%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II)
1.50 g of (4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 4.83 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane]platinum(II).
Yield: 85%
Preparative Example 9
(1) Synthesis of 2,3-O-isobutylidene-D-threitol 1,4-bis(methanesulfonate)
A mixture of D-threitol 1,4-bis(methanesulfonate) (4.00 g, 14.4 mmol), isobutyraldehyde(1.14 g, 15.8 mmol) anhydrous copper (II) sulfate(3.44 g, 21.6 mmol) and methanesulfonic acid(2 drops) in anhydrous toluene(40 ml) was stirred at a room temperature for 16 hours under a nitrogen atmosphere. The reaction mixture turned to a solid mass and to it, ethyl acetate(50 ml) and anhydrous potassium carbonate(0.3 g) were added. The reaction mixture was stirred for an additional 20 minutes, filtered, evaporated to dryness under a reduced pressure, and purified by using flash column chromatography over silica gel with a mixture of ethyl acetatehexane(1:1, v/v) as the eluent to give 4.70 g of 2,3-O-isobutylidene-D-threitol 1,4-bis(methanesulfonate) which was crystallized from absolute ethanol.
Yield: 98% m.p.: 70.0.degree.-70.5.degree. C. IR(KBr): 1360, 1332, 1182 cm.sup.-1 (O--SO.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.95(d, J=6.8 Hz, 6H, 2 CH.sub.3), 1.82(m, 1H, CH), 3.08(s, 6H, 2 SO.sub.2 CH.sub.3), 4.05-4.25(m, 2H, 2 CH), 4.25-4.45(m, 4H, 2 CH.sub.2), 4.86(d, J=4.6 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.16.50, 31.87, 37.75, 67.83, 67.91, 75.28, 75.66, 109.15
Alternatively, 2,3-O-isobutylidene-D-threitol 1,4-bis-(methanesulfonate) may be prepared by the following method.
A mixture of diethyl D-tartrate(15.00 g, 72.7 mmol), isobutyraldehyde(26.23 g, 363.7 mmol, 33.04 ml), anhydrous copper (II) sulfate(23.22 g, 145.5 mmol) and methanesulfonic acid (10 drops) in anhydrous toluene(250 ml) was stirred at a room temperature for 16 hours under a nitrogen atmosphere. Anhydrous potassium carbonate(1.00 g) was added to the reaction mixture and stirred for an additional 20 minutes. The reaction mixture was filtered, evaporated to dryness and the oily residue was purified by using flash column chromatography over silica gel with a mixture of ether-hexane(1:4, v/v) as the eluent to give 15.95 g of diethyl 2,3-O-isobutylidene-D-tartrate as an oil.
Yield: 84% IR(neat): 1757 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(CDCl.sub.3): .delta.1.00(d, J=6.9 Hz, 3H, CH.sub.3), 1.01(d, J=6.9 Hz, 3H, CH.sub.3), 1.32(t, J=7.2 Hz, 6H, 2 CH.sub.3), 1.96(m, 1H, CH(CH.sub.3).sub.2), 4.27(q, J=7.2 Hz, 2H, CH.sub.2), 4.27(q, J=7.2 Hz, 2H, CH.sub.2), 4.65(d, J=4.2 Hz, 1H, CH), 4.73(d, J=4.2 Hz, 1H, CH), 5.01(d, J=4.8 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.13.99, 14.02, 16.50, 31.61, 61.66, 77.09, 77.21, 111.12, 169.02, 169.80
15.00 g(57.6 mmol) of diethyl 2,3-O-isobutylidene -D-tartrate was reduced in the same manner as described in Step 1 of Preparative Example 5 to give 6.89 g of 2,3-O-isobutylidene -D-threitol as an oil.
Yield: 68% IR(neat): 3382 cm.sup.-1 (OH) .sup.1 H NMR(CDCl.sub.3): .delta.0.95(d, J=6.9 Hz, 6H, 2 CH.sub.3), 1.83(m, 1H, CH(CH.sub.3).sub.2), 2.54(br s, 2H, 2 OH), 3.68-3.86(m, 4H, 2 CH.sub.2), 3.87-4.00(m, 2H, 2 CH), 4.84(d, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.16.62, 16.67, 32.12, 62.27, 62.33, 78.11, 78.89, 108.24
6.70 g(38.0 mmol) of 2,3-O-isobutylidene-D-threitol was reacted with methanesulfonyl chloride in the same manner as described in Step 1 of Preparative Example 5 to give 11.13 g of 2,3-O-isobutylidene-D-threitol 1,4-bis(methanesulfonate).
Yield: 88% m.p.: 70.0.degree.-70.5.degree. C. IR(KBr): 1360, 1332, 1182 cm.sup.-1 (O--SO.sub.2)
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-isopropyl-1,3-dioxolane
4.40 g of 2,3-O-isobutylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.92 g of (4R,5R)-4,5-bis(azidomethyl)-2-isopropyl-1,3-dioxolane as a light yellow oil.
Yield: 97% [.alpha.].sub.D.sup.20 =+110.85.degree. (acetone) IR(neat): 2103 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.97(d, J=6.8 Hz, 6H, 2 CH.sub.3), 1.65-2.05(m, 1H, CH), 3.20-3.60(m, 4H, 2 CH.sub.2), 3.85-4.15(m, 2H, 2 CH), 4.85(d, J=4.6 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.16.51, 16.56, 32.00, 51.81, 51.91, 77.10, 77.90, 108.69
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl) -2-isopropyl-1,3-dioxolane
2.87 g of (4R,5R)-4,5-bis(azidomethyl)-2-isopropyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 2.13 g of (4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane as an oil.
Yield: 96% IR(neat): 3369, 3301 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.96(d, J=6.9 Hz, 6H, 2 CH.sub.3), 1.33(s, 4H, 2 NH.sub.2), 1.75-1.90(m, 1H, CH), 2.75-2.98(m, 4H, 2 CH.sub.2), 3.67-3.77(m, 2H, 2 CH), 4.79(d, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.16.65, 16.76, 32.06, 44.01, 44.25, 80.29, 80.91, 107.40
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II)
0.70 g of (4R,5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 2.21 g of cis-diiodo[(4R, 5R)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 88%
Preparative Example 10
(1) Synthesis of 2,3-O-isobutylidene-L-threitol 1,4-bis(methanesulfonate)
4.00 g of L-threitol 1,4-bis(methanesulfonate) was reacted with isobutyraldehyde in the same manner as described in Preparative Example 9 to give 4.58 g of 2,3-O-isobutylidene-L-threitol 1,4-bis(methanesulfonate).
Yield: 96%
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl) -2-isopropyl-1,3-dioxolane
4.40 g of 2,3-O-isobutylidene-L-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.90 g of (4S,5S)-4,5-bis(azidomethyl)-2-isopropyl-1,3-dioxolane.
Yield: 97% [.alpha.].sub.D.sup.20 =-110.91.degree. (acetone)
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane
2.50 g of (4S,5S)-4,5-bis(azidomethyl)-2-isopropyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 1.85 g of (4S,5S)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane.
Yield: 96%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II)
1.80 g of (4S,5S)-4,5-bis(aminomethyl)-2-isopropyl-1,3-doixolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 5.10 g of cis-diiodo[(4S,5S)-4,5-bis-(aminomethyl)-2-isopropyl-1,3-dioxolane]platinum(II).
Yield: 79%
Preparative Example 11
(1) Synthesis of 2,3-O-cyclopentylidene-D-threitol 1,4-bis(methanesulfonate)
A mixture of D-threitol 1,4-bis(methanesulfonate)(10.00 g, 35.9 mmol), cyclopentanone(6.05 g, 71.8 mmol, 6.4 ml) and methanesulfonic acid(5 drops) in benzene(100 ml) was refluxed under a Dean-Stark continuous water separator for 16 hours. The reaction mixture was cooled to a room temperature and to this clear solution, anhydrous potassium carbonate(0.50 g) was added. The reaction mixture was stirred for an additional 20 minutes, filtered, evaporated under a reduced pressure, and the residue was crystallized from absolute ethanol to give 11.02 g of 2,3-O-cyclopentylidene-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 89% m.p.: 89.5.degree.-90.5.degree. C. IR(Nujol): 1357, 1179 cm.sup.-1 (O--SO.sub.2) .sup.1 H NNR(CDCl.sub.3): .delta.1.50-2.00(m, 8H, 4 CH.sub.2), 3.08(s, 6H, 2 SO.sub.2 CH.sub.3), 4.10-4.25(m, 2H, 2 CH), 4.25-4.50(m, 4H, 2 CH.sub.2) .sup.13 C NMR(CDCl.sub.3): .delta.23.35, 37.15, 37.66, 68.03, 75.10, 120.80
Alternatively, 2,3-O-cyclopentylidene-D-threitol 1,4-bis(methanesulfonate) may prepared by the following method.
A mixture of diethyl D-tartrate(3.90 g, 18.9 mmol), cyclopentanone(6.53 g, 77.6 mmol, 6.86 ml) and methanesulfonic acid(3 drops) in benzene(60 ml) was refluxed under a Dean-Stark continuous water separator for 16 hours. The reaction mixture was cooled to a room temperature and to this clear solution, anhydrous potassium carbonate(0.30 g) was added. The reaction mixture was stirred for an additional 20 minutes, filtered, evaporated to dryness, and the residue was purified by using flash column chromatography over silica gel with a mixture of ether-hexane(1:4, v/v) as the eluent to give 2.36 g of diethyl 2,3-O-cyclopentylidene -D-tartrate as an oil.
Yield: 46% IR(neat): 1757 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(CDCl.sub.3): .delta.1.32(t, J=7.2 Hz, 6H, 2 CH.sub.3), 1.71(m, 4H, cyclopentyl), 1.80-2.10(m, 4H, cyclopentyl), 4.27(q, J=7.2 Hz, 4H, 2 CH.sub.2), 4.72(s, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.14.04, 23.38, 36.55, 61.73, 76.99, 123.26, 169.53
6.12 g(22.5 mmol) of diethyl 2,3-O-cyclopentylidene-D -tartrate was reduced by the same manner as described in Step 1 of Preparative Example 5 to give 2.57 g of 2,3-O-cyclopentylidene -D-threitol as white crystals.
Yield: 61% m.p.: 53.0.degree.-53.5.degree. C. IR(KBr): 3283 cm.sup.-1 (OH) .sup.1 H NMR(CDCl.sub.3): .delta.1.51-2.01(m, 8H, cyclopentyl), 2.56(br s, 2H, 2 OH), 3.61-3.87(m, 4H, 2 CH.sub.2), 3.93 (br s, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.23.42, 37.36, 62.42, 78.52, 119.34 2.50 g (13.3 mmol) of 2,3-O-cyclopentylidene-D-threitol was reacted with methanesulfonyl chloride in the same manner as described in Step 1 of Preparative Example 5 to give 3.72 g of 2,3-O-cyclopentylidene-D-threitol 1,4-bis(methanesulfonate).
Yield: 81% m.p.: 89.5.degree.-90.5.degree. C. IR(Nujol): 1357, 1179 cm.sup.-1 (O--SO.sub.2)
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane
5.00 g of 2,3-O-cyclopentylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 3.29 g of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane as a light yellow oil.
Yield: 95% [.alpha.].sub.D.sup.20 =+125.39.degree. (acetone) IR(neat): 2101 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.1.50-2.05(m, 8H, 4 CH.sub.2), 3.25-3.60(m, 4H, 2 CH.sub.2), 3.89-4.09(m, 2H, 2 CH), .sup.13 C NMR(CDCl.sub.3): .delta.23.25, 37.07, 51.73, 76.83, 120.15
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane
3.20 g of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane was reduced in the same manner as described in Preparative Example 1 to give 2.40 g of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane as an oil.
Yield: 96% IR(neat): 3370, 3302 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.1.36(s, 4H, 2 NH.sub.2), 1.50-1.90(m, 8H, 4 CH.sub.2), 2.77-2.95(m, 4H, 2 CH.sub.2), 3.68-3.78 (m, 2H, 2 CH), .sup.13 C NMR(CDCl.sub.3): .delta.23.23, 37.30, 44.13, 80.02, 118.45
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II)
1.26 g of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 3.87 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II) as a yellow solid.
Yield: 90%
Preparative Example 12
(1) Synthesis of 2,3-O-cyclopentylidene-L-threitol 1,4-bis(methanesulfonate)
5.00 g of L-threitol 1,4-bis(methanesulfonate) was reacted with cyclopentanone in the same procedure as described in Preparative Example 11 to give 5.93 g of 2,3-O-cyclopentylidene-L-threitol 1,4-bis(methanesulfonate).
Yield: 96% m.p.: 90.degree.-91.degree. C.
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane
5.73 g of 2,3-O-cyclopentylidene-L-threitol 1,4-bis(methanesulfo) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 3.85 g of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane.
Yield: 97% [.alpha.].sub.D.sup.20 =-122.90.degree. (acetone)
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane
2.86 g of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane was reduced in the same manner as described in Preparative Example 1 to give 2.12 g of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane.
Yield: 95%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II)
2.00 g of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 6.00 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclopentane]platinum(II).
Yield: 88%
Preparative Example 13
(1) Synthesis of 2,3-O-cyclohexylidene-D-threitol 1,4-bis(methanesulfonate)
4.00 g(14.4 mmol) of D-threitol 1,4-bis(methanesulfonate) was reacted with cyclohexanone(2.82 g, 28.7 mmol, 2.98 ml) in the same manner as described in Preparative Example 11 to give 4.73 g of 2,3-O-cyclohexylidene-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 92% m.p. 95.5.degree..about.96.5.degree. C.
Alternatively, 2,3-O-cyclohexylidene-D-threitol 1,4-bis(methanesulfonate) may be prepared by the following method.
A mixture of diethyl D-tartrate(3.90 g, 18.9 mmol), cyclohexanone(7.62 g, 77.6 mmol, 8.04 ml) and methanesulfonic acid(3 drops) in toluene(60 ml) was refluxed under a Dean-Stark continuous water separator for 16 hours. The reaction mixture was cooled to a room temperature and to this clear solution, anhydrous potassium carbonate(0.30 g) was added. The reaction mixture was stirred for an additional 20 minutes, filtered, evaporated to dryness, and the residue was purified by using flash column chromatography over silica gel with a mixture of ether-hexane(1:4, v/v) as the eluent to give 4.74 g of diethyl 2,3-O-cyclohexylidene-D-tartrate as an oil.
Yield: 88% IR(neat): 1757, 1735 cm.sup.-1 (C.dbd.O) .sup.1 H NMR(CDCl.sub.3): .delta.1.31(t, J=7.2 Hz, 6H, 2 CH.sub.3), 1.37-1.47 (m, 2H, cyclohexyl), 1.57-1.80(m, 8H, cyclohexyl), 4.27(q, J=7.2 Hz, 4H, 2 CH.sub.2), 4.77(s, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.13.98, 23.65, 24.78, 35.77, 61.63, 76.83, 114.40, 169.78
6.58 g(23.0 mmol) of diethyl 2,3-O-cyclohexylidene-D-tartrate was reduced in the same manner as described in Step 1 of Preparative Example 5 to give 2.98 g of 2,3-O-cyclohexylidene-D-threitol as colorless crystals.
Yield: 64% m.p.: 49.5.degree.-51.5.degree. C. IR(KBr): 3383 cm.sup.-1 (OH) .sup.1 H NMR(CDCl.sub.3): .delta.1.34-1.49(m, 2H, cyclohexyl), 1.63(br s, 8H, cyclohexyl), 2.35(br s, 2H, 2 OH), 3.64-3.86(m, 4H, 2 CH.sub.2), 3.99(br s, 2H, 2 CH)
2.70 g(13.3 mmol) of 2,3-O-cyclohexylidene-D-threitol was reacted with methanesulfonyl chloride in the same manner as described in Step 1 of Preparative Example 5 to give 4.29 g of 2,3-O-cyclohexylidene-D-threitol 1,4-bis(methanesulfonate).
Yield: 90% m.p.: 95.5.degree.-96.5.degree. C.
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane
4.73 g of 2,3-O-cyclohexylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 3.16 g of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane as a light yellow oil.
Yield: 95% [.alpha.].sub.D.sup.20 =+120.36.degree. (acetone) IR(neat): 2100 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.1.20-1.85(m, 10H, 5 CH.sub.2), 3.21-3.62(m, 4H, 2 CH.sub.2), 3.95-4.15(m, 2H, 2 CH), .sup.13 C NMR(CDCl.sub.3): .delta.23.77, 24.93, 36.45, 51.70, 76.60, 110.99
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane
3.10 g of (4R,5R)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane was reduced in the same manner as described in Preparative Example 1 to give 2.44 g of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane as an oil.
Yield: 99% IR(neat): 3370, 3297 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.1.37(s, 4H, 2 NH.sub.2), 1.40-1.80(m, 10H, 5 CH.sub.2), 2.78-2.93(m, 4H, 2 CH.sub.2), 3.70-3.80 (m, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.23.71, 25.00, 36.74, 44.20, 79.55, 109.06
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II)
0.70 g of (4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Example 1 to give 2.00 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II) as a yellow solid.
Yield: 88%
Preparative Example 14
(1) Synthesis of 2,3-O-cyclohexylidene-L-threitol 1,4-bis(methanesulfonate)
5.00 g(18.0 mmol) of L-threitol 1,4-bis(methanesulfonate) was reacted with cyclohexanone(3.53 g, 35.9 mmol, 3.72 ml) in the same manner as described in Preparative Example 11 to give 6.14 g of 2,3-O-cyclohexylidene-L-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 95%
(2) Synthesis of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane
5.94 g of 2,3-O-cyclohexylidene-L-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 4.11 g of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane.
Yield: 98% [.alpha.].sub.D.sup.20 =-122.51.degree. (acetone)
(3) Synthesis of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane
3.03 g of (4S,5S)-4,5-bis(azidomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane was reduced in the same manner as described in Preparative Example 1 to give 2.35 g of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane.
Yield: 98%
(4) Synthesis of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II)
2.30 g of (4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 6.42 g of cis-diiodo[(4S,5S)-4,5-bis(aminomethyl)-1,3-dioxolane-2-spiro-1'-cyclohexane]platinum(II).
Yield: 86%
Preparative Example 15
(1) Synthesis of 2,3-O-diethylmethylene-D-threitol 1,4-bis(methanesulfonate)
A mixture of D-threitol 1,4-bis(methanesulfonate) (4.17 g, 15.0 mmol), 3-pentanone(2.58 g, 30.0 mmol, 3.17 ml) and methanesulfonic acid(3 drops) in benzene(50 ml) was refluxed under a Dean-Stark continuous water separator for 16 hours. The reaction mixture was cooled to a room temperature and to this clear solution, anhydrous potassium carbonate(0.20 g) was added. The reaction mixture was stirred for an additional 20 minutes, filtered, evaporated under a reduced pressure, and the residue was crystallized from absolute ethanol to give 4.32 g of 2,3-O-diethylmethylene-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 83% m.p.: 53.5.degree. C. IR(KBr): 1351, 1170 cm.sup.-1 (O--SO.sub.2) .sup.1 H NNR(CDCl.sub.3): .delta.0.92(t, J=7.3 Hz, 6H, 2 CH.sub.3), 1.68(q, J=7.3 Hz, 4H, 2 CH.sub.2), 3.08(s, 6H, 2 SO.sub.2 CH.sub.3), 4.08-4.22(m, 2H, 2 CH), 4.22-4.44(m, 4H, 2 CH.sub.2) .sup.13 C NMR(CDCl.sub.3): .delta.7.85, 30.17, 37.67, 67.85, 75.53, 114.85
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2,2-diethyl-1,3-dioxolane
4.26 g(12.3 mmol) of 2,3-O-diethylmethylene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Example 1 to give 2.65 g of (4R,5R)-4,5-bis(azidomethyl)-2,2-diethyl-1,3-dioxolane as a light yellow oil.
Yield: 90% [.alpha.].sub.D.sup.20 =+105.89.degree. (acetone) IR(neat): 2104 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.93(t, J=7.3 Hz, 6H, 2 CH.sub.3), 1.70(q, J=7.3 Hz, 4H, 2 CH.sub.2), 3.27-3.63(m, 4H, 2 CH.sub.2), 3.89-4.10(m, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.7.91, 30.21, 51.75, 77.13, 114.16
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane
2.62 g(10.9 mmol) of (4R,5R)-4,5-bis(azidomethyl)-2,2-diethyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 2.05 g of (4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane as a colorless oil.
Yield: 100% IR(neat): 3374, 3299 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.91(t, J=7.3 Hz, 6H, 2 CH.sub.3), 1.39(s, 4H, 2 NH.sub.2), 1.65(q, J=7.3 Hz, 4H, 2 CH.sub.2), 2.68-3.04(m, 4H, 2 CH.sub.2), 3.60-3.87(m, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.8.01, 30.56, 44.24, 80.50, 112.41
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II)
2.05 g(10.9 mmol) of (4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Example 1 to give 6.35 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2,2-diethyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 91%
Preparative Example 16
(1) Synthesis of 2,3-O-(1-methylpropylidene)-D-threitol 1,4-bis(methanesulfonate)
A mixture of D-threitol 1,4-bis(methanesulfonate)(3.50 g, 12.6 mmol), 2-butanone(70 ml), anhydrous copper(II) sulfate(3.01 g, 18.9 mmol) and concentrated sulfuric acid(0.1 ml) was stirred at room temperature for 16 hours under a nitrogen atmosphere. The reaction mixture was filtered and the filtrate was neutralized with 28% of ammonium hydroxide solution. The filtered solution was evaporated to dryness and crystallized from absolute ethanol to give 3.69 g of 2,3-O-(1-methylpropylidene)-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 98% m.p.: 71.5.degree.-72.5.degree. C. IR(KBr): 1352, 1332, 1182 cm.sup.-1 (O-SO.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.94(t, J=7.3 Hz, 3H, CH.sub.3), 1.38(s, 3H, CH.sub.3), 1.70(q, J=7.3 Hz, 2H, CH.sub.2), 3.08(s, 6H, 2 SO.sub.2 CH.sub.3), 4.02-4.27(m, 2H, 2 CH), 4.31-4.45(m, 4H, 2 CH.sub.2) .sup.13 C NMR(CDCl.sub.3): .delta.8.01, 24.59, 32.69, 37.70, 67.74, 67.97, 75.02, 75.60, 112.90
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-ethyl-2-methyl-1,3-dioxolane
3.50 g(11.7 mmol) of 2,3-O-(1-methylpropylidene)-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.35 g of (4R,5R)-4,5-bis(azidomethyl)-2-ethyl-2-methyl-1,3-dioxolane as a light yellow oil.
Yield: 88% [.alpha.].sub.D.sup.20 =+128.24.degree. (acetone) IR(neat): 2105 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.96(t, J=7.3 Hz, 3H, CH.sub.3), 1.41(s, 3H, CH.sub.3), 1.73(q, J=7.3 Hz, 2H, CH.sub.2), 3.23-3.65(m, 4H, 2 CH.sub.2), 3.88-4.18(m, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.8.04, 24.53, 32.82, 51.61, 51.70, 76.65, 77.32, 112.28
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane
2.70 g(11.9 mmol) of (4R,5R)-4,5-bis(azidomethyl)-2-ethyl-2-methyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 2.08 g of (4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane as an oil.
Yield: 100% IR(neat): 3373, 3319 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.94(t, J=7.4 Hz, 3H, CH.sub.3), 1.35(br s, 7H, CH.sub.3 and 2 NH.sub.2), 1.68(q, J=7.4 Hz, 2H, CH.sub.2), 2.71-3.03(m, 4H, 2 CH.sub.2), 3.63-3.93(m, 2H, 2 CH) .sup.13 C NMR(CDCl.sub.3): .delta.8.10, 25.01, 33.01, 43.99, 44.24, 79.84, 80.55, 110.49
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II)
2.08 g(11.9 mmol) of (4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 7.12 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-ethyl-2-methyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 96%
Preparative Example 17
(1) Synthesis of 2,3-O-butylidene-D-threitol 1,4-bis(methanesulfonate)
A mixture of D-threitol 1,4-bis(methanesulfonate)(3.50 g, 12.6 mmol), n-butyraldehyde(1.00 g, 13.8 mmol, 1.25 ml), anhydrous copper(II) sulfate(3.01 g, 18.9 mmol) and methanesulfonic acid (3 drops) in anhydrous toluene(35 ml) was stirred at a room temperature for 16 hours under a nitrogen atmosphere. The reaction mixture was added with anhydrous potassium carbonate(0.30 g) and stirred for an additional 20 minutes. The reaction mixture was filtered, evaporated to dryness and crystallized from absolute ethanol to give 4.10 g of 2,3-O-butylidene-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 98% m.p.: 59.0.degree.-59.5.degree. C. IR(KBr): 1360, 1332, 1782 cm.sup.-1 (O-SO.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.95(t, J=7.4 Hz, 3H, CH.sub.3), 1.45(m, 2H, CH.sub.2), 1.66(m, 2H, CH.sub.2), 3.08(s, 6H, 2 SO.sub.2 CH.sub.3), 4.10-4.27(m, 2H, 2 CH), 4.27-4.50(m, 4H, 2 CH.sub.2), 5.10(t, J=4.6 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.13.88, 17.02, 35.83, 37.74, 67.80, 68.06, 75.06, 75.69, 105.49
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-propyl-1,3-dioxolane
4.01 g(12.1 mmol) of 2,3-O-butylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.45 g of (4R,5R)-4,5-bis(azidomethyl)-2-propyl-1,3-dioxolane as a light yellow oil.
Yield: 90% [.alpha.].sub.D.sup.20 =119.96.degree. (acetone) IR(neat): 2104 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.96(t, J=7.4 Hz, 3H, CH.sub.3), 1.46(m, 2H, CH.sub.2), 1.67(m, 2H, CH.sub.2), 3.30-3.60(m, 4H, 2 CH.sub.2), 4.01(br s, 2H, 2 CH), 5.10 (t, J=4.5 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.13.92, 17.11, 36.09, 51.87, 51.96, 76.89, 77.90, 105.02
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane
2.37 g(10.5 mmol) of (4R,5R)-4,5-bis(azidomethyl)-2-propyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 1.81 g of (4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane as an oil.
Yield: 99% IR(neat): 3368, 3297 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.95(t, J=7.2 Hz, 3H, CH.sub.3), 1.45(m, 2H, CH.sub.2), 1.63(m, 2H, CH.sub.2), 1.68(s, 4H, 2 NH.sub.2), 2.70-3.05(m, 4H, 2 CH.sub.2), 3.75(br s, 2H, 2 CH), 5.03(t, J=4.2 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.14.01, 17.23, 36.27, 43.94, 44.24, 80.15, 81.01, 103.71
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane]platinum(II)
1.81 g(10.4 mmol) of (4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 4.73 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-propyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 87%
Preparative Example 18
(1) Synthesis of 2,3-O-isopentylidene-D-threitol 1,4-bis(methanesulfonate)
3.50 g(12.6 mmol) of D-threitol 1,4-bis(methanesulfonate) was reacted with isovaleraldehyde(1.19 g, 13.8 mmol, 1.48 ml) in the same manner as described in Preparative Example 17 to give 4.18 g of 2,3-O-isopentylidene-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 96% m.p.: 85.5.degree.-86.degree. C. IR(KBr): 1356, 1333, 1181 cm.sup.-1 (O--SO.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.95(d, J=6.6 Hz, 6H, 2 CH.sub.3), 1.58(dd, J=4.9 Hz, J=6.8 Hz, 2H, CH.sub.2), 1.79(m, 1H, CH), 3.09(s, 6H, 2 SO.sub.2 CH.sub.3), 4.18(br s, 2H, 2 CH), 4.27-4.50(m, 4H, 2 CH.sub.2 CH.sub.2), 5.13(t, J=4.9 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.22.82, 22.88, 24.38, 37.80, 42.67, 67.75, 68.05, 74.98, 75.73, 104.91
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-isobutyl-1,3-dioxolane
4.08 g of 2,3-O-isopentylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 2.78 g of (4R,5R)-4,5-bis(azidomethyl)-2-isobutyl-1,3-dioxolane as a light yellow oil.
Yield: 98% [.alpha.].sub.D.sup.20 =+118.44.degree. (acetone) IR(neat): 2103 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.96(d, J=6.6 Hz, 6H, 2 CH.sub.3), 1.59(dd, J=5.1 Hz, J=6.6 Hz, 2H, CH.sub.2), 1.83(m, 1H, CH), 3.30-3.60(m, 4H, 2 CH.sub.2), 4.01 (br s, 2H, 2 CH), 5.13(t, J=5.1 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.22.81, 22.89, 24.44, 42.89, 51.88, 51.96, 76.77, 77.85, 104.38
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane
2.71 g(11.3 mmol) of (4R,5R)-4,5-bis(azidomethyl)-2-isobutyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 2.12 g of (4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane as an oil.
Yield: 100% IR(neat): 3370, 3295 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.95(d, J=6.6 Hz, 6H, 2 CH.sub.3), 1.55(dd, J=4.9 Hz, J=6.8 Hz, 2H, CH.sub.2), 1.81(m, 1H, CH), 2.03(s, 4H, 2 NH.sub.2), 2.73-2.93 (m, 4H, 2 NH.sub.2), 3.73(br s, 2H, 2 CH), 5.06(t, J=4.9 Hz, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.22.98, 24.46, 43.06, 43.78, 44.13, 79.88, 80.89, 103.07
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane]platinum(II)
2.11 g(11.2 mmol) of (4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 5.36 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-isobutyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 89%
Preparative Example 19
(1) Synthesis of 2,3-O-neopentylidene-D-threitol 1,4-bis(methanesulfonate)
3.50 g(12.6 mmol) of D-threitol 1,4-bis(methanesulfonate) was reacted with trimethylacetaldehyde(1.19 g, 13.8 mmol, 1.50 ml) in the same manner as described in Preparative Example 17 to give 2.08 g of 2,3-O-neopentylidene-D-threitol 1,4-bis(methanesulfonate) as white crystals.
Yield: 48% m.p.: 100.0.degree. C. IR(KBr): 1358, 1331, 1181 cm.sup.-1 (O--SO.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.92(s, 9H, 3 CH.sub.3), 3.07(s, 3H, SO.sub.2 CH.sub.3), 3.08(s, 3H, SO.sub.2 CH.sub.3), 4.10-4.24(m, 2H, 2 CH), 4.24-4.50(m, 4H, 2 CH.sub.2), 4.74(s, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.24.06, 34.19, 37.74, 37.79, 67.81, 67.91, 75.49, 75.67, 110.98
(2) Synthesis of (4R,5R)-4,5-bis(azidomethyl)-2-tert-butyl-1,3-dioxolane
1.98 g(5.7 mmol) of 2,3-O-neopentylidene-D-threitol 1,4-bis(methanesulfonate) was reacted with sodium azide in the same manner as described in Preparative Example 1 to give 1.36 g of (4R,5R)-4,5-bis(azidomethyl)-2-tert-butyl-1,3-dioxolane as a light yellow oil.
Yield: 99% [.alpha.].sub.D.sup.20 =+104.69.degree. (acetone) IR(neat): 2103 cm.sup.-1 (N.sub.3) .sup.1 H NMR(CDCl.sub.3): .delta.0.94(s, 9H, 3 CH.sub.3), 3.32-3.49(m, 4H, 2 CH.sub.2), 3.92-4.04(m, 2H, 2 CH), 4.74(s, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.24.05, 34.16, 51.73, 51.88, 77.31, 77.91, 110.53
(3) Synthesis of (4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane
1.29 g(5.4 mmol) of (4R,5R)-4,5-bis(azidomethyl)-2-tert-butyl-1,3-dioxolane was reduced in the same manner as described in Preparative Example 1 to give 1.00 g of (4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane as an oil.
Yield: 99% IR(neat): 3366, 3295 cm.sup.-1 (NH.sub.2) .sup.1 H NMR(CDCl.sub.3): .delta.0.92(s, 9H, 3 CH.sub.3), 1.49(s, 4H, 2 NH.sub.2), 2.70-3.00(m, 4H, 2 CH.sub.2), 3.66-3.80(m, 2H, 2 CH), 4.66(s, 1H, CH) .sup.13 C NMR(CDCl.sub.3): .delta.24.31, 34.33, 44.03, 44.18, 80.43, 80.96, 109.50
(4) Synthesis of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane]platinum(II)
0.99 g(5.3 mmol) of (4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane was reacted with an aqueous solution of potassium tetraiodoplatinate(II) in the same manner as described in Preparative Example 1 to give 2.55 g of cis-diiodo[(4R,5R)-4,5-bis(aminomethyl)-2-tert-butyl-1,3-dioxolane]platinum(II) as a yellow solid.
Yield: 90%
The compounds prepared in accordance with the process described in the above working examples were assayed on their anti-tumor activity in vitro and in vivo; and solubility in water and toxicity were also determined, as demonstrated below.
1. Growth inhibition test on cultured murine leukemia L1210 cells
Murine leukemia L1210 cells(1.times.10.sup.5) were treated with various concentrations of the compounds prepared in the above examples in RPMI 1640 medium supplemented with 10% fetal calf serum, and cultured in a 5% CO.sub.2 humidified incubator at 37.degree. C. for 48 hours. Their viability, estimated by staining with 0.17% Trypan blue, was compared with that of control cells cultured in the identical medium without the compounds. The assays were carried out using at least six different concentrations, and the IC.sub.50 values (the concentrations in .mu.g/ml required for 50% inhibition of growth) were calculated from their logarithmic dose-response curves. The results are shown in Table 1.
TABLE 1______________________________________Compound IC.sub.50 (.mu.g/ml)______________________________________Example 1 0.36Example 2 0.15Example 3 0.10Example 4 0.08Example 5 0.35Example 6 0.22Example 7 0.06Example 8 0.06Example 9 0.08Example 10 0.13Example 11 0.10Example 12 0.10Example 13 0.55Example 14 0.46Example 15 0.33Example 16 0.34Example 17 0.44Example 18 0.32Example 19 0.29Example 20 1.28Example 21 2.08Example 22 0.90Example 23 1.75Example 24 0.55Example 25 1.02Example 26 0.65Example 27 2.36Example 28 1.14Example 29 2.12Example 30 0.55Example 31 1.75Example 32 1.05Example 33 0.50Example 34 0.60Example 35 0.44Example 36 0.76Example 37 0.42Example 38 0.43Example 39 0.31Example 40 0.52Example 41 0.44Example 42 0.54Example 43 0.72Example 44 0.47Example 45 1.40Example 46 2.23cisplatin 0.06carboplatin 1.98______________________________________
As shown in Table 1, the compounds of the present invention have a potent ability to inhibit the growth of cancer cells at a low concentration.
2. Antitumor activity test on murine leukemia L1210 in vivo
Murine leukemia L1210 cells were maintained in the peritoneal cavities of 6-week-old male DBA/2 mice by weekly transfer in accordance with the procedure described in cancer chemotherapy Reports, Part 3, 3(2), 7 (1972). Specifically, 1.times.10.sup.6 leukemia cells were inoculated into the abdominal cavities of 6-week-old male BDF.sub.1 mice weighing 21.+-.3 g on day 0. Each treatment group consisted of seven mice. The test compounds were dissolved or suspended in 0.5% carboxymethyl cellulose(CMC) solution (in water) and were administered intraperitoneally on days 1, 5, and 9 relative to the tumor inoculation.
Thirty mice of 6-week-old male BDF.sub.1 weighing 21.+-.3 g were used as the control group, which were injected with 0.5% CMC solution only in the same manner as above.
Anti-tumor activities of the compounds were evaluated in terms of the T/C % values calculated from the mean survival time(T) of the compound-treated group over that(C) of the control group. ##EQU1##
TABLE 2______________________________________Dose (mg/kg)T/C (%)Compound 1.5 3.1 6.2 12.5 25 50 100______________________________________Example 1 ND 95 132 137 160 toxic NDExample 2 ND 112 179 201 toxic toxic NDExample 3 ND 154 161 295 toxic toxic NDExample 4 ND 102 146 233 231 toxic NDExample 5 ND 104 136 154 167 toxic NDExample 6 ND 113 162 205 toxic toxic NDExample 7 ND 155 166 191 toxic toxic NDExample 8 ND 154 198 245 toxic toxic NDExample 9 ND 148 187 231 toxic toxic NDExample 10 ND 154 161 201 toxic toxic NDExample 11 ND 102 146 191 toxic toxic NDExample 12 ND 104 136 154 167 toxic NDExample 13 ND ND ND 178 207 92 NDExample 14 ND ND ND 213 toxic toxic NDExample 15 ND ND ND 225 243 192 NDExample 16 ND ND ND 204 227 toxic NDExample 17 ND ND ND 201 327 139 NDExample 18 ND ND ND 206 165 toxic NDExample 19 ND ND ND 208 232 toxic NDExample 20 ND ND 122 187 137 193 271Example 22 ND ND 125 129 247 262 382Example 23 ND ND 108 115 150 201 254Example 24 ND ND 122 130 193 208 391Example 26 ND ND 124 170 217 283 317Example 27 ND ND 112 106 124 148 142Example 28 ND ND 113 106 126 133 130Example 30 ND ND 109 122 110 148 185Example 31 ND ND 102 109 94 106 117Example 33 ND ND ND 146 133 276 NDExample 34 ND ND ND 140 156 241 NDExample 35 ND ND ND 144 204 245 NDExample 36 ND ND ND 133 179 190 NDExample 37 ND ND ND 130 180 231 NDExample 38 ND ND ND 123 148 220 NDExample 39 ND ND ND 217 169 203 NDExample 40 ND ND ND ND 213 165 248Example 41 ND ND ND ND 123 174 204Example 42 ND ND ND ND 172 160 150Example 43 ND ND ND ND 197 245 toxicExample 44 ND ND ND ND 137 169 243Example 45 ND ND ND ND 147 232 216cisplatin 142 167 82 toxic toxic ND NDcarboplatin ND ND 107 125 148 196 197______________________________________ *ND: Not Determined
As shown in Table 2, the compounds of the present invention have an excellent life prolongation effect for mice inoculated with murine leukemia L1210 cells.
3. Test for water solubility
A standard plot of UV absorbance(220 nm) vs. concentration was made; and employed to determine water-solubility. The standard solution was made in water or 10% ethanol in water (in case of a compound with poor solubility).
For the solubility study, saturated solutions in water were prepared by vortex mixing the compounds in water for 60 sec., then ultrasonification for 60 sec., vortex mixing for 180 sec., ultrasonification for 60 sec., and finally vortex mixing for 5 min. The mixture was then passed through a 0.45 micron disposable membrane filter before dilution and UV measurement. The water-solubility data measured with the compounds prepared in the working examples are shown in Table 3 hereof.
TABLE 3______________________________________ Solubility in waterCompound (mg/ml, 20.degree. C.)______________________________________Example 1 >30Example 2 17.5Example 3 5.8Example 4 2.9Example 5 >50Example 6 >50Example 7 >30Example 8 >30Example 9 11.6Example 10 >30Example 11 4.6Example 12 2.1Example 13 >100Example 14 >100Example 15 4.9Example 16 3.8Example 17 >100Example 18 >100Example 19 >100Example 20 3.1Example 21 3.1Example 22 24.9Example 23 22.1Example 24 12.0Example 25 11.8Example 26 2.0Example 27 1.9Example 28 2.1Example 29 2.0Example 30 1.9Example 31 1.9Example 32 0.9Example 33 21.9Example 34 >50Example 35 >30Example 36 27.1Example 37 2.0Example 38 4.1Example 39 5.3Example 40 11.3Example 41 >30Example 42 6.7Example 43 7.9Example 44 7.8Example 45 2.7Example 46 0.9Cisplatin 1.2Carboplatin 10.0______________________________________
As shown in Table 3, a large number of the compounds of the present invention have a good solubility in water.
4. Test for nephrotoxicity
The compounds of the present invention were dissolved or suspended in 0.5% CMC solution(in water) and were administered intraperitoneally one time to 8-week-old male ICR mice weighing 30.+-.3 g. Each treatment and control groups consisted of six mice.
The administration amount of the test compound was 1.5 times the optimum dose obtained in Table 2, or more. On days 1, 4 and 8 after administration, their blood was collected under ether anesthesia for measurement of blood urea nitrogen concentration (BUN value) and creatinine concentration. The results are shown in Table 4.
A pair of kidneys were taken and, after immediate weighing, were stored in a 10% neutral buffered formalin solution. The results are shown in Table 5. The body weight ratio shown in Table 5 is a ratio of the body weight measured on days 1, 4 and 8 from the administration of the compound to the body weight measured on the administration day.
TABLE 4__________________________________________________________________________ Dose No. of mice BUN (mg/100 ml).sup.a Creatinine (mg/100 ml).sup.aCompound (mg/kg) employed 1st day 4th day 8th day 1st day 4th day 8th day__________________________________________________________________________Control 0.5% 6 26.0 29.7 27.8 CMC .+-. 1.3 .+-. 2.2 .+-. 2.1Example 1 37.5 6 28.07 94.42 27.44 .+-. 0.98 .+-. 45.22 .+-. 2.79Example 2 18.8 6 25.87 22.13 31.13 .+-. 1.45 .+-. 2.22 .+-. 2.73Example 3 18.8 6 26.45 20.04 40.86.sup.c .+-. 0.08 .+-. 0.55 .+-. 3.88Example 4 37.5 6 24.23 22.13 25.54 .+-. 0.64 .+-. 1.44 .+-. 1.23Example 5 37.5 6 25.33 73.66 28.70 .+-. 1.63 .+-. 25.47 .+-. 0.97Example 6 18.8 6 22.41 22.67 30.41 .+-. 1.00 .+-. 1.18 .+-. 0.92Example 7 18.8 6 23.69 22.04 31.73 .+-. 1.28 .+-. 1.21 .+-. 1.51Example 8 18.8 6 27.1 22.4 28.4 .+-. 1.2 .+-. 4.2 .+-. 1.5Example 9 18.8 6 26.2 21.8 30.1 .+-. 1.4 .+-. 5.2 .+-. 1.7Example 15 18.8 6 19.4.sup.b 22.1.sup.c 27.1 .+-. 1.1 .+-. 1.1 .+-. 1.9Example 19 18.8 6 38.6.sup.b 27.9 50.7 .+-. 1.6 .+-. 5.2 .+-. 17.3Example 20 150 6 25.4 64.3.sup.c 30.1 0.30 0.53.sup.c 0.28 .+-. 3.4 .+-. 15.7 .+-. 3.1 .+-. 0.04 .+-. 0.09 .+-. 0.05Example 22 150 6 26.0 36.0 26.7 0.28 0.25 0.23 .+-. 1.3 .+-. 3.9 .+-. 2.8 .+-. 0.02 .+-. 0.02 .+-. 0.03Example 23 150 6 24.8 32.1 42.0.sup.b 0.26 0.30 0.28 .+-. 0.9 .+-. 3.1 .+-. 2.3 .+-. 0.02 .+-. 0.01 .+-. 0.02Example 24 150 6 26.7 20.9 36.1.sup.c 0.25 0.22 0.30 .+-. 1.6 .+-. 2.3 .+-. 2.5 .+-. 0.01 .+-. 0.02 .+-. 0.00Example 26 150 6 26.7 23.7 30.0 0.24 0.22 0.27 .+-. 2.2 .+-. 6.0 .+-. 1.6 .+-. 0.05 .+-. 0.04 .+-. 0.02Example 27 150 6 28.9 27.2 35.3.sup.b 0.23 0.28 0.29 .+-. 1.8 .+-. 2.3 .+-. 0.5 .+-. 0.02 .+-. 0.02 .+-. 0.02Example 30 150 6 33.0.sup.c 21.4 30.7 0.32 0.20 0.31 .+-. 2.1 .+-. 3.2 .+-. 3.1 .+-. 0.04 .+-. 0.03 .+-. 0.02Example 31 150 6 43.1.sup.b all all 0.35 all all .+-. 5.8 dead dead .+-. 1.3 dead deadExample 37 75.0 6 27.5 26.4 28.4 .+-. 2.2 .+-. 3.2 .+-. 1.7Example 38 75.0 6 22.6 27.0 28.3 .+-. 1.6 .+-. 2.2 .+-. 1.5Example 39 75.0 6 26.5 29.1 23.7 .+-. 1.2 .+-. 4.2 .+-. 1.5Cisplatin 6 6 42.8.sup.c 343.0.sup.b 38.3.sup.c 0.32 2.86.sup.b 0.35 .+-. 5.5 .+-. 82.9 .+-. 0.8 .+-. 0.04 .+-. 0.44 .+-. 0.05__________________________________________________________________________ .sup.a :The values are the means plus or minus standard error in milligrams per 100 ml of blood .sup.b :Significantly different from control group; p < 0.01 .sup.c :Significantly different from control group; p < 0.05
TABLE 5__________________________________________________________________________ Dose 1st day 4th day 8th dayCompound (mg/kg) BWR.sup.a Kidney wt.sup.b BWR.sup.a Kidney wt.sup.b BWR.sup.a Kidney wt.sup.b__________________________________________________________________________Control -- 1.00 528 .+-. 24.5 1.01 563 .+-. 26.0 1.08 530 .+-. 25.6Example 20 150 0.95 470 .+-. 62.0 0.79 .sup. 465 .+-. 19.5.sup.c 0.93 552 .+-. 39.0Example 22 150 0.98 497 .+-. 17.2 0.82 .sup. 425 .+-. 12.5.sup.c 0.97 465 .+-. 31.8Example 23 150 0.98 492 .+-. 22.7 0.96 535 .+-. 16.3 0.99 527 .+-. 13.8Example 24 150 0.96 487 .+-. 19.0 0.97 538 .+-. 23.6 1.02 532 .+-. 30.7Example 26 150 0.97 532 .+-. 29.8 0.85 457 .+-. 41.0 1.03 516 .+-. 24.4Example 27 150 0.96 497 .+-. 22.8 0.98 547 .+-. 20.6 1.00 530 .+-. 35.0Example 30 150 0.99 485 .+-. 20.8 0.90 487 .+-. 39.0 1.04 542 .+-. 22.5Example 31 150 0.94 485 .+-. 15.0 all all dead all all dead dead deadCisplatin 6 0.94 471 .+-. 22.1 0.82 420 .+-. 6.3.sup.c 0.88 475 .+-. 42.9__________________________________________________________________________ Note .sup.a :BWR: body weight ratio. .sup.b :Paired weight (mg): the values are the means plus or minus standard error. .sup.c :Significantly different from the control group; p < 0.05.
As shown in Tables 4 and 5, the BUN and the creatinine values obtained for the compounds tested were lower than the value obtained for cisplatin; and close to the values obtained with the control group administered with 0.5% CMC solution (in water); and kidney weight was slightly reduced. These results indicate that the present compounds have very low nephrotoxicity.
Acute toxicity test
7-week-old ICR mice(male: 34.+-.2 g; female: 31.+-.2 g) were fed with solid food and water under the condition of 23.+-.1.degree. C. temperature and 65.+-.5% humidity before the test.
Each treatment group consisted of 6 mice. The test compounds were administered intraperitoneally.
For 7 days after the administration, the appearance and the fate of the tested animals were recorded. The dead animals were subjected to autopsy and their visible pathological changes were observed. Their viscerals were stored in 10% formalin solution. The results are as shown in Table 6.
TABLE 6__________________________________________________________________________ Dose Number of dead miceCompound Sex (mg/kg) 1st day 2nd day 3rd day 4th day 5th day 6th day for 7 days Lethality LD.sub.50__________________________________________________________________________Example 1 male 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 1/6 1/6 16.7 61.7 55.0 0/6 2/6 2/6 33.3 71.4 0/6 3/6 1/3 4/6 66.7 female 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 1/6 1/6 16.7 68.0 55.0 0/6 2/6 2/6 33.3 71.4 0/6 2/6 1/4 3/6 50.0Example 2 male 25.0 0/6 0/6 32.5 0/6 1/6 1/5 1/4 3/6 50.0 42.3 0/6 3/6 2/3 5/6 83.3 34.0 55.0 0/6 4/6 1/2 1/1 6/6 100.0 71.4 0/6 4/6 2/2 6/6 100.0 female 25.0 0/6 0/6 32.5 0/6 2/6 1/4 3/6 50.0 42.3 0/6 3/6 1/3 4/6 66.7 35.4 55.0 0/6 4/6 1/2 1/1 6/6 100.0 71.4 0/6 4/6 2/2 6/6 100.0Example 3 male 25.0 0/6 0/6 32.5 0/6 1/6 0/6 42.3 0/6 1/6 2/6 33.3 43.5 55.0 0/6 4/6 1/2 1/1 6/6 100.0 71.4 0/6 4/6 2/2 6/6 100.0 female 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 1/6 1/5 2/6 33.3 46.4 55.0 0/6 4/6 1/2 5/6 83.2 71.4 0/6 4/6 2/2 6/6 100.0Example 4 male 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 0/6 60.2 55.0 0/6 2/6 1/4 3/6 50.0 71.4 0/6 3/6 1/3 4/6 66.7 female 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 0/6 63.3 55.0 0/6 1/6 1/5 2/6 33.3 71.4 0/6 2/6 1/4 1/3 4/6 66.7Example 5 male 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 0/6 63.3 55.0 0/6 1/6 1/6 16.7 71.4 0/6 3/6 1/3 4/6 66.7 female 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 0/6 70.4 55.0 0/6 1/6 1/6 16.7 71.4 0/6 2/6 1/4 3/6 50.0Example 6 male 25.0 0/6 0/6 32.5 0/6 1/6 0/6 16.7 42.3 0/6 1/6 2/5 1/3 4/6 66.7 38.5 55.0 0/6 4/6 1/2 1/1 6/6 100.0 71.4 0/6 4/6 2/2 6/6 100.0 female 25.0 0/6 0/6 32.5 0/6 1/6 1/6 16.7 42.3 0/6 1/6 1/5 1/4 3/6 50.0 42.3 55.0 0/6 4/6 1/2 5/6 83.3 71.4 0/6 4/6 2/2 6/6 100.0Example 7 male 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 1/6 1/5 2/6 33.3 60.0 55.0 0/6 1/6 1/5 2/6 33.3 71.4 0/6 2/6 2/4 4/6 66.7 female 25.0 0/6 0/6 32.5 0/6 0/6 42.3 0/6 1/6 1/6 16.7 61.7 55.0 0/6 1/6 1/5 2/6 33.3 71.4 0/6 3/6 1/3 4/6 66.7Example 8 male 41.3 0/6 0/6 0.0 54.9 0/6 2/6 2/4 4/6 66.7 71.4 0/6 1/6 4/5 5/6 83.3 54.2 91.8 0/6 2/6 4/4 6/6 100.0 female 41.3 0/6 0/6 0.0 54.9 0/6 1/6 2/5 3/6 50.0 71.4 0/6 2/6 3/4 5/6 83.7 57.2 91.8 0/6 1/6 3/5 2/2 6/6 100.0Example 9 male 41.3 0/6 2/6 1/4 0/6 0.0 54.9 0/6 2/6 2/4 4/6 66.7 71.4 0/6 1/6 2/5 2/3 5/6 83.3 43.7 91.8 0/6 1/6 4/5 1/1 6/6 100.0 female 41.3 0/6 2/6 2/6 0.0 54.9 0/6 1/6 3/5 4/6 50.0 71.4 0/6 1/6 3/5 1/2 5/6 83.7 48.3 91.8 0/6 2/6 4/4 6/6 100.0Example 15 male 41.3 0/6 0/6 0.0 54.9 0/6 2/6 2/4 4/6 66.7 71.4 0/6 4/6 1/2 5/6 83.3 54.2 91.8 0/6 2/6 3/4 1/1 6/6 100.0 female 41.3 0/6 0/6 0.0 54.9 0/6 1/6 1/5 1/4 3/6 50.0 71.4 0/6 1/6 3/5 1/2 5/6 83.7 57.2 91.8 0/6 1/6 2/5 2/3 1/1 6/6 100.0Example 18 male 41.3 0/6 1/6 1/5 2/4 4/6 66.7 54.9 0/6 1/6 1/5 1/4 1/3 4/6 66.7 71.4 0/6 2/6 2/4 1/2 5/6 83.3 36.3 91.8 0/6 3/6 1/3 1/2 1/1 6/6 100.0 female 41.3 0/6 1/6 2/5 3/6 55.0 54.9 0/6 1/6 2/5 1/3 4/6 66.7 71.4 0/6 1/6 3/5 1/2 5/6 83.3 43.7 91.8 1/6 1/6 2/5 2/3 1/1 6/6 100.0Example 19 male 41.3 0/6 1/6 2/5 3/6 50.0 54.9 0/6 1/6 2/5 1/3 4/6 66.7 71.4 0/6 1/6 2/5 2/3 5/6 83.7 43.7 91.8 0/6 1/6 4/5 1/1 6/6 100.0 female 41.3 0/6 1/6 1/5 2/6 33.3 54.9 0/6 1/6 2/5 1/3 4/6 66.7 71.4 0/6 1/6 3/5 1/2 5/6 83.3 48.3 91.8 0/6 1/6 2/5 2/3 1/1 6/6 100.0Example 20 male 94 0/6 0/6 123 1/6 1/5 2/6 33.3 160 0/6 2/6 1/4 2/3 5/6 83.3 141.6 208 0/6 6/6 6/6 100.0 270 0/6 4/6 2/2 6/6 100.0 female 94 0/6 0/6 123 0/6 2/6 2/6 33.3 160 0/6 2/6 2/4 4/6 66.7 144.2 208 0/6 1/6 5/5 6/6 100.0 270 0/6 4/6 2/2 6/6 100.0Example 22 male 94 0/6 0/6 123 0/6 0/6 160 1/6 1/5 1/4 1/3 4/6 66.7 168.6 208 0/6 4/6 1/2 5/6 83.3 270 0/6 2/6 4/4 6/6 100.0 female 94 0/6 0/6 123 0/6 1/6 1/6 16.7 160 0/6 2/6 1/4 3/6 50.0 159.7 208 0/6 1/6 4/5 5/6 83.3 270 0/6 4/6 2/2 6/6 100.0Example 24 male 160 0/6 0/6 208 0/6 1/6 1/6 16.7 270 0/6 1/6 2/5 1/3 1/2 5/6 83.3 246.7 352 1/6 2/5 2/3 1/1 6/6 100.0 457 0/6 2/6 4/6 6/6 100.0 female 160 0/6 0/6 208 0/6 0/6 270 0/6 1/6 1/5 1/4 3/6 50.0 289.4 352 0/6 3/6 2/3 5/6 83.3 457 0/6 4/6 2/2 6/6 100.0Example 26 male 160 0/6 0/6 208 0/6 1/6 1/6 16.7 270 0/6 2/6 2/6 33.3 280.6 352 0/6 1/6 3/5 4/6 66.7 457 0/6 2/6 4/4 6/6 100.0 female 160 0/6 0/6 208 0/6 0/6 270 0/6 1/6 1/6 16.7 304.8 352 0/6 2/6 2/4 4/6 66.7 457 0/6 4/6 2/2 6/6 100.0Example 30 male 94 0/6 0/6 123 1/6 0/6 160 0/6 1/6 1/6 16.7 176.4 208 1/6 1/6 3/5 5/6 83.3 270 0/6 2/6 4/4 6/6 100.0 female 94 0/6 0/6 123 0/6 0/6 160 0/6 1/6 1/6 16.7 180.2 208 0/6 2/6 2/4 4/6 66.7 270 0/6 4/6 2/2 6/6 100.0Example 37 male 71.4 0/6 1/6 1/6 16.7 91.8 0/6 2/6 2/4 4/6 66.7 84.5 100.0 0/6 4/6 1/2 5/6 83.3 130.0 0/6 2/6 3/4 1/1 6/6 100.0 female 100.0 0/6 0/6 0.0 130.0 0/6 1/6 1/5 1/4 3/6 50.0 93.6 169.0 0/6 1/6 3/5 1/2 5/6 83.3 219.0 0/6 1/6 2/5 2/3 1/1 6/6 100.0Example 38 male 100.0 1/6 2/6 1/4 4/6 66.7 130.0 0/6 1/6 2/5 1/3 1/2 5/6 83.7 169.0 0/6 2/6 3/4 1/1 6/6 100.0 86.4 219.0 0/6 1/6 1/5 4/4 6/6 100.0 female 100.0 0/6 1/6 2/5 3/6 50.0 130.0 0/6 1/6 2/5 1/3 1/2 5/6 83.7 169.0 0/6 1/6 1/5 2/2 6/6 100.0 98.1 219.0 0/6 1/6 2/5 2/3 1/1 6/6 100.0Example 39 male 71.4 0/6 0/6 0.0 91.8 0/6 2/6 1/6 3/6 50.0 100.0 0/6 4/6 1/6 5/6 83.3 93.6 130.0 0/6 2/6 3/6 1/6 6/6 100.0 female 71.4 0/6 0/6 0.0 91.8 0/6 1/6 1/6 2/6 50.0 94.7 100.0 0/6 1/6 3/6 1/6 5/6 83.3 130.0 0/6 1/6 2/6 2/6 1/6 6/6 100.0Cisplatin male 4.7 0/6 0/6 6.0 0/6 0/6 7.8 0/6 1/6 2/5 1/3 4/6 66.7 7.7 10.1 0/6 4/6 2/3 6/6 100.0 13.0 0/6 1/6 5/5 6/6 100.0 female 4.7 0/6 0/6 6.0 0/6 0/6 7.8 0/6 1/6 1/5 1/4 1/3 4/6 66.7 7.7 10.1 0/6 3/6 2/3 1/1 6/6 100.0 13.0 0/6 1/6 4/5 1/1 6/6 100.0__________________________________________________________________________
As shown in Table 6, the compounds of the present invention have a higher median lethal dose(LD.sub.50) value than cisplatin; and it is relatively harmless in the dosages of several grams or more.

Number	Date	Country
91-4627	Mar 1991	KRX
91-7207	May 1991	KRX
91-13205	Jul 1991	KRX
91-19969	Nov 1991	KRX
91-24631	Dec 1991	KRX
91-24632	Dec 1991	KRX

Number	Name	Date
4665210	Bitha et al.	May 1987
4730069	Kolar et al.	Mar 1988
4783452	Haines et al.	Nov 1988
4870070	Bitha et al.	Sep 1989

Platinum(II) complex and processes for preparing the same

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Peter W. Feit et al., J. Med. Chem. 7, 14, 1964.
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