Patent Application
20150225418
The invention relates to naphthalene and perylene derivatives.
Many naphthalene and perylene derivates are important colorants. Beside this traditional application, naphthalene and, in particular, perylene derivatives gain more and more interest in other applications such as in organic field-effect transistors, organic light emitting devices, photovoltaic devices such as dye-sensitized solar cells (DSCs), and xerography.
The design and preparation of naphthalene and perylene derivatives, which are tuned to be suitable for a particular application, are an active area of research.
Naphthalene and perylene derivatives, which are substituted in all four peri-positions, in particular with substituents such as cyano, alkyoxy, aryloxy, silyl, substituted amino, alkylthio, arylthio, alkyl and aryl, could be suitable for many applications.
DE 340091 describes the preparation of 3,4,9,10-tetracyanoperylene from 3,4,9-tricyano-10-bromoperylene. 3,4,9-tricyano-10-bromoperylene was prepared from 3,4,9,10-tetrabromo-perylene, which was obtained by bromination of perylene in nitrobenzene.
JP 2002-012861 describes perylene derivatives, which carry a substituted or unsubstituted amino group in the 1 or 2 position. In particular, JP 2002-012861 describes the preparation of 3,4,9,10-tetraphenylperylene and 3,4,9,10-tetracyanoperylene, both substituted in 1 and 7 position with a substituted amino group, from 1,7-dibromo-3,4,9,10-tetraphenylperylene, respectively, 1,7-dibromoperylene 3,4,9,10-tetracarbonitrile.
Zinke, A.; Pongratz, A., Funke, K. Chem. Ber. 1925, 58, 330 to 332 and DE 498 039 describes a process for the halogenation of perylene, wherein the halogenation is effected in the presence of a solvent such as nitrobenzene, and the halogen is employed in statu nascendi. According to the examples 3,9-dichloroperylene, tetrachloroperylene (mp. 350° C.), and hexachloroperylene (mp. 356° C.) are prepared by running an acetic acid solution of hydrogen peroxide into a solution of perylene in nitrobenzene at the same time as an acetic acid solution of concentrated hydrochloric acid is being added. It is said that the tetrachloroperylene is likely to be the 3,4,9,10-tetrachloroperylene. A further substitution of X is not described.
Many naphthalene derivatives, which are chlorinated or brominated in all four pen-positions, are known (DE 66611, Whitehurst, J. S. J. Chem. Soc. 1951, 221 to 226, Bassilios, H. F.; Salem, A. Y.; Shawky, M. Rec. Trav. Chim Pays-Bas 1962, 81, 209 to 214, DE 1958 595, Mesh, L. A.; Grudtsyn, Y. V. J. Org. Chem. USSR 1977, 13, 2384 to 2389, Brady, J. H.; Redhouse, A. D.; Wakefield, B. J. J. Chem. Res. Miniprint 1982, 6, 1541 to 1554, Otsubo, T.; Sukenobe, N.; Aso, Y.; Ogura, F. Chem. Lett. 1987, 315 to 316, Garcia, R.; Riera, J.; Carilla, J.; Julia, L.; Molins, E., Miravitlles C. J. Org. Chem. 1992, 57, 5712, Kodama, T.; Kodani, M.; Takimiya, K.; Aso, Y.; Otsubo, T. Heteroatom. Chem. 2001, 12, 287 to 292).
DE 1 154 799 describes the following process
DE 1 154 799 emphasizes that it was not possible to obtain the tetrahalogenated naphthaline. A further substitution of X is not described.
It was the object of the present invention to provide naphthalene and perylene derivatives, which are substituted in all four peri-positions.
The object is solved by the process of claim 1, the compounds of claim 8 and the compounds of claim 12.
The process of the present invention for the preparation of compounds of formula
wherein
n is 0 or 1, R11 and R12 are the same and are selected from the group consisting of CN, OR300, Si(R301)3, NHR302, NR303R304, SR305 and R306
R11 and R12 together are selected from the group consisting of
R15, R16, R17, R19, R19, R20, R21 and R22 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
comprises the step of treating a compound of formula
wherein
n has the meaning as depicted for formula (3),
R9 and R10 are the same or different and are COOH or COOR200,
R9 and R10 together are
and
R1, R2, R3, R4, R5, R6, R7 and R8 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R200, OR201, SR202, OC(O)R203 and C(O)OR204,
R3 and R5, respectively, R4 and R6 together are
b) an X-donor, wherein X is Cl, Br or I,
in order to obtain a compound of formula
wherein
X has the meaning as depicted for the X-donor,
n has the meaning as depicted for formula (3),
and
R1, R2, R3, R4, R5, R6, R7 and R8 have the meaning as depicted for formula (2).
C1-10-alkyl and C1-20-alkyl can be branched or unbranched. Examples of C1-10-alkyl are methyl, ethyl, butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, isopentyl, hexyl, heptyl, octyl, 1,1-dimethyl-3,3-dimethylbutyl, nonyl and decyl. Examples of C1-20-alkyl are C1-10-alkyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl and eicosyl,
C2-20-alkenyl can be branched or unbranched. Examples of C2-20-alkenyl are vinyl, propenyl, cis-2-butenyl, trans-2-butenyl, 3-butenyl, cis-2-pentenyl, trans-2-pentenyl, cis-3-pentenyl, trans-3-pentenyl, 4-pentenyl, 2-methyl-3-butenyl, hexenyl, heptenyl, octenyl, nonenyl and docenyl, linoleyl (C18), linolenyl (C18), oleyl (C18) and arachidonyl (C20).
C2-20-alkynyl can be branched or unbranched. Examples of C2-20-alkynyl are ethynyl, 2-propynyl, 2-butynyl, 3-butynyl, pentynyl, hexynyl, heptynyl, octynyl, nonynyl, decynyl, undecynyl, dodecynyl, undecynyl, dodecynyl, tridecynyl, tetradecynyl, pentadecynyl, hexadecynyl, heptadecynyl, octadecynyl, nonadecynyl and icosynyl (C20).
Examples of C5-8-cycloalkyl are cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl.
Examples of C6-14-aryl are phenyl and naphthyl.
Examples of halogen are F, Cl, Br and I.
Examples of alkali metals are Na, K and Li.
Examples of N(R400R401R402R403) are tetra (n-butyl)ammonium and decyl-methyl-dioctyl-ammonium.
Examples of hexa(C1-10-alkyl)-guanidinium are hexamethylguanidinium and hexaethylguanidinium.
Examples of X-donors are X—X, X-succinimide and N,N″-di-X-isocyanuric acid.
Preferably, R11 and R12 are the same and are selected from the group consisting of CN, OR300 and Si(R301)3,
R11 and R12 together are
More preferably, R11 and R12 are the same and are selected from the group consisting of CN, OR300 and Si(R301)3,
R11 and R12 together are
Most preferably, R11 and R12 are the same and are selected from the group consisting of CN, OR300 and Si(R301)3,
R11 and R12 together are
Preferably, n is 1,
Preferably, R15, R16, R17, R19, R19, R20, R21 and R22 are the same or different and are selected from the group consisting of H, Cl, Br, I, CN and OR311,
R17 and R19, respectively, R18 and R20 together are
Preferably, if n is 0, R15, R16, R17 and R18 are H.
Preferably, if n is 1, R15, R16, R21 and R22 are H, and R17, R18, R19 and R20, are the same or different and are selected from the group consisting of F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
More preferably, if n is 1, R15, R16, R21 and R22 are H, and R17, R18, R19 and R20 are the same or different and are selected from the group consisting of Cl, Br, I, CN and OR311,
R17 and R19, respectively, R18 and R20 together are
Most preferably, if n is 1, R15, R16, R21 and R22 are H, and R17, R18, R19 and R20 are the same or different and are selected from the group consisting of Cl, Br, I and CN.
Even most preferably, if n is 1, R15, R16, R21 and R22 are H, and R17, R18, R19 and R20 are Cl.
Preferably, R9 and R10 are the same and are COOH,
or
R9 and R10 together are
More preferably, R9 and R10 together are
Preferably, R1, R2, R3, R4, R5, R6, R7 and R8 are the same or different and are selected from the group consisting of H, Cl, Br, I, CN and OR201,
R3 and R5, respectively, R4 and R6 together are
Preferably, if n is 0, R1, R2, R3 and R4 are H.
Preferably, if n=1, R1, R2, R7 and R8 are H, and R3, R4, R5 and R6, are the same or different and are selected from the group consisting of F, Cl, Br, I, CN, R200, OR201, SR202, OC(O)R203, and C(O)OR264,
R3 and R5, respectively, R4 and R6 together are
More preferably, if n is 1, R1, R2, R7 and R8 are H, and R3, R4, R5 and R6 are the same or different and are selected from the group consisting of Cl, Br, I, CN and OR201,
R3 and R5, respectively, R4 and R6 together are
Most preferably, if n is 1, R1, R2, R7 and R8 are H, and R3, R4, R5 and R6 are the same or different and are selected from the group consisting of Cl, Br and OR261,
R3 and R5, respectively, R4 and R6 together are
Preferably, M is an alkali metal, more preferably Na.
Preferably, X is Cl or Br, more preferably Br.
Preferably, the compound of formula (2) is first treated with MOH, followed by treatment with the X-donor. Usually the process is performed without the isolation of any intermediate products in a so-called “one pot reaction”.
The compound of formula (2) is commercially available or can be obtained by methods known in the art.
Preferably, the X-donor is X—X. More preferably, the X-donor is X—X, wherein X is Cl or Br. Most preferably, the X-donor is X—X, wherein X is Br.
Preferably, the treatment with MOH and the treatment with the X-donor are performed in an aqueous solvent such as water or mixtures of water with a suitable organic solvent such as tetrahydrofuran or dioxane. More preferably, the treatment with MOH and the treatment with the X-donor are performed in water as solvent.
Preferably, the treatment with MOH is performed at a temperature from 10 to 100° C., more preferably from 20 to 60° C.
Preferably, the molar ratio of MOH/compound of general formula (2) is 4/1 to 20/1, more preferably 4/1 to 10/1, most preferably 4/1 to 7/1.
Preferably, the molar ratio of the X-donor/compound of general formula (2) is 4/1 to 30/1, more preferably 4/1 to 20/1, most preferably 4/1 to 17/1.
Preferably, the treatment with the X-donor is performed at a temperature from 10 to 260° C., more preferably from 20 to 120° C., most preferably from 20 to 100° C.
The compound of formula (1) can be isolated by methods known in the art, for example by extraction with a suitable organic solvent such as dichloromethane. After isolation the compound of formula (1) may be further purified by methods known in the art, such as recrystallization or chromatography.
The compounds of formula (3) can be directly obtained from the compounds of formula (1) or via intermediate compounds in a multiple steps by methods known in the art.
For example, the compounds of formula (3), wherein R11 and R12 are both CN or OR300, can be prepared by treating the compound of formula (1) with M2CN or M20R300 , wherein M2 can be an alkali metal or a transition metal.
For example, the compounds of formula (3), wherein R11 and R12 both are Si(R301)3, can be prepared by treating the compound of formula (1) with an organyl-M3, wherein M3 can be an alkali metal, followed by, X2—Si(R301)3, wherein X2 can be halogen.
For example, the compounds of formula (3), wherein R11 and R12 together are
can be prepared by treating the compound of formula (1) with sulphur.
For example, the compounds of formula (3), wherein R11 and R12 both are NHR302, NR303R304, respectively, SR305 can be prepared by treating the compound of formula (1) with NH2R302, NHR303R304, respectively, HSR305.
For example, the compounds of formula (3), wherein R11 and R12 both are R306 can be prepared by treating the compound of formula (1) with R306boronic acid in the presence of a suitable catalyst such as Pd[P(Ph)3]4.
For example, the compounds of formula
can be prepared by treating the compound of formula
with sulfur.
For example the compound of formula
can be prepared by treating the compound of formula
with 4-(2,4,4-trimethylpentan-2-yl)phenol and K2CO3.
For example, the compound of formula
can be prepared by treating the compound of formula
with n-butyl lithium and trimethylsilyl chloride.
For example, the compound of formula
can be prepared by treating a compound of formula
with CuCN.
Also part of the present invention are compounds of formula
wherein
X is Cl, Br or I,
n is 0 or 1,
and
R1, R2, R3, R4, R5, R6, R7 and R8 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R200, OR201, SR202, OC(O)R203 and C(O)OR264,
R3 and R5, respectively, R4 and R6 together are
with the proviso
Preferred are compounds of formula
wherein
X is Cl, Br or I,
n is 1,
and
R1, R2, R3, R4, R5, R6, R7 and R8 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R200, OR201, SR202, OC(O)R203 and C(O)OR204,
R3 and R5, respectively, R4 and R6 together are
with the proviso
that if n is 1 and X is Cl or Br, R1, R2, R3, R4, R5, R6, R7 and R8 are not H.
More preferred are compounds of formula
wherein
X is Cl, Br or I,
n is 1,
and
R1, R2, R7 and R8 are H, and R3, R4, R5 and R6, are the same or different and are selected from the group consisting of F, Cl, Br, I, CN, R200, OR201, SR202, OC(O)R203 and C(O)OR204,
R3 and R5, respectively, R4 and R6 together are
The preferences of n, R1, R2, R3, R4, R5, R6, R7, R8 and X given above for the process for the preparation of compounds of formula (3), also apply to the compounds of formula (1).
In particular preferred are the following compounds
The compounds of formula (1) are versatile building blocks.
Also part of the present invention are compounds of formula
wherein
n is 0 or 1,
R11 and R12 are the same and are selected from the group consisting of CN, OR300, Si(R301)3, NH R302, NR303R304, SR305 and R306
R11 and R12 together are selected from the group consisting of
R15, R16, R17, R18, R19, R20, R21 and R22 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
with the proviso that if
n is 0, R11 and R12 are both CN, then R15, R16, R17 and R18 are not all H, and that if
n is 1, R11 and R12 are both CN or phenyl, and R15, R16, R18, R19, R20, R21 and R22 are H, then R17 and R20 are not Br.
Preferred are the compounds of formula
wherein
n is 0 or 1,
R11 and R12 are the same and are selected from the group consisting of CN, OR300 and Si(R301)3,
R11 and R12 together are
R15, R16, R17, R18, R19, R20, R21 and R22 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
with the proviso
that if n is 0, R11 and R12 are both CN, then R15, R16, R17 and R18 are not all H,
and
that if n is 1, R11 and R12 are both CN or phenyl, and R15, R16, R18, R19, R20, R21 and R22 are H, then R17 and R20 are not Br.
More preferred are compounds of formula
wherein
n is 1,
R11 and R12 are the same and are selected from the group consisting of CN, OR300 and Si(R301)3,
R11 and R12 together are
R15, R16, R17, R19, R19, R20, R21 and R22 are the same or different and are selected from the group consisting of H, F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
with the proviso
that if n is 1, R11 and R12 are both CN or phenyl, and R15, R16, R18, R19, R20, R21 and R22 are H, then R17 and R20 are not Br.
Even more preferred are compounds of formula
wherein
n is 1,
R11 and R12 are the same and are selected from the group consisting of CN, OR300 and Si(R301)3,
R11 and R12 together are
R15, R16, R21 and R22 are H, and R17, R18, R19 and R20, are the same or different and are selected from the group consisting of F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
Most preferred are compounds of formula
wherein
n is 1,
R11 and R12 together are
and
R15, R16, R21 and R22 are H, and R17, R18, R19 and R20, are the same or different and are selected from the group consisting of F, Cl, Br, I, CN, R310, OR311, SR312, OC(O)R313 and C(O)OR314,
R17 and R19, respectively, R18 and R20 together are
In particular preferred are following compounds
The compounds of formula (3) can be used in various applications, for example as colorants or dyes, or in electronic devices such in organic field-effect transistors, organic light emitting devices and in photovoltaic devices such as dye-sensitized solar cells (DSCs).
Also part of the invention is the use of the compounds of formula (3) in electronic devices.
Also part of the invention is the use of the compounds of formula (3) as dye.
The process of the present invention is advantageous as it allows the convenient preparation of compounds of formula (3).
The key intermediates of the process of the present invention for the preparation of the compounds of formula (3) are the compounds of formula (1) carrying four X-groups, wherein X is Cl, Br or I, in the peri-positions. The compounds of formula (1) are versatile building blocks, which allow the easy introduction of various substituents in the peri-positions by methods known in the art. In case, the compounds of formula (1) also carry suitable substituents such as Cl in the R1, R2, R3, R4, R5, R6, R7 and/or R8 positions, these substituents can also be easily replaced with other substituents.
The compounds of formula (1) can be prepared in a very convenient and economic manner from the compounds of formula (2) The compounds of formula (2), especially the compounds of formula (2), wherein R9 and R10 together are
are readily available and of low cost. The compounds of formula (1) are usually obtained in high yields (for example higher than 80%), especially when n is 1, X is Br, and R1, R2, R7 and R8 are H, and R3, R4, R5 and R6 are the same and are selected from the group consisting of H, Cl, and Br, or R3 and R5, respectively, R4 and R6 together are
Steps a) and b) can be performed at moderate temperatures, for example at temperatures below 100° C. In addition, the steps a) and b) can be performed in an aqueous solvent such as water, and in a so-called “one pot reaction”.
Preparation of Compound 1a
20 ml 1M NaOH was added to a suspension of compound 2a (4.00 mmol) in 20 ml water and the mixture was stirred to obtain a limpid solution. Bromine (1.0 ml, 3.11 g) was added in one portion and the reaction mixture was stirred at 90-95° C. for 24 h. The precipitate was filtered and dried. The crude solid was extracted with dichloromethane. Organic solvent was evaporated to dryness and compound 1a was purified by column chromatography using hexane as eluent on silica. Yield 180 mg (10%). FD-Mass: calc.: 443.75 found: 444.0. 1H-NMR (δ(ppm), CD2Cl2): 7.66 (s, 4H, CH); 13C-NMR (δ(ppm), CD2Cl2): 120.54 (4C, CBr); 130.49 (2C, C); 135.91 (4C, CH).
Preparation of Compound 1b
10 ml 1M NaOH was added to a suspension of compound 2b (2.00 mmol) in 20 ml water and the mixture was stirred at 55° C. for 30 min. Bromine (1.0 ml) was added and reaction mixture was stirred for 24 h. The precipitate was filtered and dried. Crude compound 1b was purified by sublimation (1.27 g; 90%) or recrystallization from 1,2-dichlorobenzene (1.17 g; 83%). FD-Mass: calc.: 705.67 found: 706.0. MALDI-TOF: calc.: 705.67 found: 705.75. Elemental analysis: calc.: % C 34.04; % H 0.57; found: % C 34.23; % H 0.70. 1H-NMR (δ(ppm), 1,2-dichlorobenzene-d4): 7.80 (s, 4H).
Preparation of Compound 1C
10 ml 1M NaOH was added to a suspension of compound 2c (1.42 g, 2.00 mmol) in 30 ml water and the mixture was stirred at 55° C. for 30 min. Bromine (1.0 ml) was added and reaction mixture was stirred for 24 h. The precipitate was filtered and dried (1.70 g, 96%). The crude compound 1c was purified by recrystallization from 1,2-dichlorobenzene (1.47 g; 83%). FD-Mass: calc.: 883.48 found: 883.7. Elemental analysis: calc.: % C 27.19; % H 0.46; found: % C 27.34; % H 0.53. 1H-NMR (δ(ppm), 1,2-dichlorobenzene-d4): 7.96 (s, 4H).
Preparation of Compound 1d
After adding 3 ml 1M NaOH to a solution of compound 2d (0.50 mmol) in 10 ml water THF was added to obtain a clear solution. Bromine (0.40 ml) was added in one portion and the reaction mixture was stirred at room temperature for 0.5 to 1 h (TLC monitoring). A Solution of Na2SO3 (1 g in 10 ml water) was added and stirred for 20 min. Compound 1d was extracted with dichloromethane and purified by column chromatography using hexane as eluent on silica. Yield 5-30 mg (1-6%). 1H-NMR (δ(ppm), CD2Cl2): 0.67 (s, 36H, CH3); 1.27 (s, 12H, CH3); 1.28 (s, 12H, CH3); 1.65 (s, 8H, CH2); 6.72 (d, 8H, 3JHH=8.7 Hz); 7.19 (d, 8H, 3JHH=8.7 Hz); 7.32 (s, 4H). FD-Mass: calc.: 1385.13; found: 1385.9.
Preparation of Compound 2e
1M NaOH (22 ml) was added to a mixture of compound 2b (2.65 g, 5.00 mmol) and 18 ml water under argon. The mixture was stirred at 70° C. for 30 min and 1 ml Aliquat 336 (Stark' catalyst) was added and stirred additional 10 min at the same temperature. 1-lodoheptane was added and the reaction mixture was refluxed for 2 h. After cooling down to room temperature, the mixture was extracted with dichloromethane. The solvent was removed under vacuum and crude compound 2e was purified by column chromatography (silica gel, petroleum ether/dichloromethane). Yield 4.315 g (90%) as orange oil. FD-Mass: calc.: 958.87; found: 959.7. 1H-NMR (δ(ppm), CDCl3): 0.82 (t, 12H, CH3, 3JHH=6.7 Hz); 1.18-1.43 (m, 32H, CH2); 1.74 (p, 8H, 3JHH=6.9 Hz, CH2); 4.21-4.34 (m, 8H, CH2O); 8.01 (s, 4H, CH-perylene). 13C-NMR (δ(ppm), CDCl3): 14.20 (4C, CH3); 22.73 (4C, CH2); 26.06 (4C, CH2); 28.66 (4C, CH2); 29.11 (4C, CH2); 31.84 (4C, CH2); 66.48 (4C, CH2O); 123.24 (2C); 127.32 (4C); 130.90 (4C); 132.12 (4C); 133.67 (4C); 134.06 (2C); 167.11 (4C, CO). Elemental analysis calcd (%) for C52H64Cl4O8: C 65.13, H 6.73; found: C 65.17, H 6.87.
Preparation of Compound 2f
Pd(PPh3)4 (780 mg, 0.67 mmol) and Bu3SnSSnBu3 (3.67 g, 6.00 mmol) were added to a solution of compound 2e (2.60 g, 2.71 mmol) in 100 ml toluene under argon. The mixture was stirred and refluxed for 24 h. The solvent was removed under vacuum and the crude compound 2f was washed with methanol and purified by column chromatography (silica gel, petroleum ether/ethyl acetate). Yield 1.58 g (66%). 1H-NMR (δ(ppm), CDCl3): 0.83 (t, 12H, CH3, 3JHH=6.9 Hz); 1.26-1.48 (m, 32H, CH2); 1.83 (p, 8H, 3JHH=6.9 Hz, CH2); 4.42 (t, 8H, CH2O, 3JHH=6.9 Hz); 8.74 (s, 4H, CH-perylene). 13C-NMR (δ(ppm), CDCl3): 14.22 (4C, CH3); 22.78 (4C, CH2); 26.26 (4C, CH2); 28.91 (4C, CH2); 29.24 (4C, CH2); 31.92 (4C, CH2); 66.22 (4C, CH2O); 120.98 (2C); 121.54 (2C); 125.31 (4C); 129.60 (4C); 131.13 (4C); 136.83 (4C); 168.61 (4C, CO). Elemental analysis calcd (%) for C52H64O8S2: C 70.88, H 7.32; S 7.28 found: C 70.85, H 76.48, S 7.22.
Preparation of Compound 2g
KOH (2.25 g, 34 mmol) and 5 ml water were added to a solution of compound 2f (1.5 g, 1.70 mmol) in 100 ml 2-propanol. The reaction mixture was refluxed overnight. After cooling the reaction mixture was poured onto ice/10% hydrochloric acid. The precipitate was filtered, washed with water and methanol and dried. The solid was suspended in acetic acid (50 ml) and stirred at 70° C. for 5 h. The acetic acid was removed under vacuum. The crude compound 2g was used without further purification. Yield 0.75 g (98%). FD-Mass: calc.: 452.41; found: 453.2
Preparation of Compound 1e
4.5 ml 1M NaOH was added to a suspension of compound 2g (0.455 g, 1.00 mmol) in 20 ml water and the mixture was stirred at 30° C. for 20 min. Bromine (0.21 ml, 4.1 mmol) was added and the reaction mixture was stirred for 10 min at 30° C. The precipitate was filtered, washed with water and dried. The crude compound 1e was suspended in THF (20 ml) and filtered, washed and dried (0.56 g; 89%). MALDI-TOF: calc.: 627.99 found: 627.8 Elemental analysis calcd (%) for C20H4BraS2: C 38.25, H 0.64; S 10.21 found: C 37.95, H 1.39, S 9.65.
Preparation of Compound 3a
A suspension of 3,4,9,10-tetrabromo-1,6,7,12-tetrachloroperylene (0.71 g, 1.00 mmol) and sulfur (0.26 g, 8.0 mmol) in 40 ml NMP was stirred at 190° C. for 3 h. After cooling down to room temperature the reaction mixture was poured into water. The precipitate was filtered, washed with water and dried. The crude compound 3a was purified by column chromatography using dichloromethane as eluent on silica (0.50 g, 97%). FD-Mass: calc.: 514.32; found: 514.1. 1H-NMR (δ(ppm), DMSO-d6): 7.72 (s, 4H).
Preparation of Compound 3b
A mixture of compound 1b (706 mg, 1 mmol), 4-(2,4,4-trimethylpentan-2-yl)phenol (1240 mg, 6 mmol) and K2CO3 (830 mg, 6 mmol) in 30 ml NMP was stirred at 120° C. for 5 h. The mixture was cooled down to room temperature and dichloromethane (100 ml) was added. The solution was washed several times with water, dried and evaporated. Crude compound 3b was purified by column chromatography using hexane/dichloromethane as eluent on silica. Yield 890 mg (74%). 1H-NMR (δ(ppm), CD2Cl2): 0.66 (s, 36H, CH3); 1.27 (s, 24H, CH3); 1.65 (s, 8H, CH2); 6.72 (d, 8H, 3JHH=8.7 Hz); 6.88 (s, 4H); 7.24 (d, 8H, 3JHH=8.8 Hz). 13C-NMR (δ(ppm), CD2Cl2): 31.98 (4C, CH3); 32.01 (4C, CH3); 32.15 (12C, CH3); 32.83 (4C, CH2); 38.77 (4C); 57.47 (4C); 116.29 (2C); 117.98 (4C); 118.61 (8C, CH); 121.30 (4C); 128.20 (8C, CH); 133.66 (4C); 137.32 (2C); 146.44 (4C, CH); 154.01 (4C); 154.98 (4C). FD-Mass: calc.: 1207.32; found: 1208.1.
4.40 ml of solution of n-BuLi (1.6 M, 7 mmol) was added to a suspension of compound 1b (1 mmol, 706 mg) in 20 ml dry THF at −78° C. The reaction mixture was stirred at −78° C. for 1 h and TMSCl (0.90 ml, 7 mmol) was added dropwise to the solution. The mixture was allowed to warm gradually to room temperature and stirred additional 2 h. Methanol (1 ml) was added and the solvents were evaporated. The crude compound 3c was purified by column chromatography using hexane as eluent on silica and additional recrystallization from methanol. Yield 325 mg (48%). 1H-NMR (δ(ppm), CDCl3): 0.52 (s, 18H, CH3); 0.54 (s, 18H, CH3); 7.68 (s, 2H); 8.18 (s, 2H). 13C-NMR (δ(ppm), CD2Cl2): 0.07 (6C, CH3); 0.28 (6C, CH3); 125.59 (2C); 125.84 (2C); 131.39 (2C); 132.67 (2C); 134.52 (2C); 134.93 (2C); 135.58 (2C); 138.28 (2C); 138.76 (2C); 140.26 (2C).
Preparation of Compound 3d
A suspension of compound 1b (2.11 g, 3.00 mmol) and CuCN (5.40 g, 60 mmol) in 50 ml DMF was stirred at 130° C. for 2 h. After cooling down to room temperature the reaction mixture was poured in water. The precipitate was filtered, dried and dissolved in 600 ml dichloromethane. 20 g of silica was added to the solution and evaporated to dryness. Crude compound 3d was purified by column chromatography using dichloromethane as eluent on silica. (1.03 g, 70%). FD-Mass: calc.: 490.13; found: 489.7. 1H-NMR (δ(ppm), C2D2Cl4): 8.21 (s, 4H, CH).
| Number | Date | Country | Kind |
|---|---|---|---|
| 12182331.4 | Aug 2012 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IB2013/058009 | 8/27/2013 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 61694783 | Aug 2012 | US |
