.beta.-3-Amino nor-tropane compounds

Abstract

There are disclosed nor-tropane derivatives substituted at the 3 position with aroylamino or heteroaroylamino and substituted at the 8 position with benzyl, substituted benzyl, 2-methyl thiophene, 3-methyl thiophene, 2-methyl furan or cyclohexylmethyl. The compounds are prepared by condensing the carboxylic acids corresponding to said aroyl or heteroaroyl group with the corresponding .beta.-3-amino-8-substituted nor-tropanes. The compounds possess neuroleptic properties.

Description

The present invention relates to novel nor-tropane derivatives and particularly novel 3-aroylamino and 3-heteroaroylamino nor-tropanes, substituted in position 8, a process for preparing same and their application in therapeutics.

These new derivatives comply more precisely with the formula: ##STR1## in which R represents: either a benzyl nucleus, in which case A--CO-- designates:

a 5-pyrimidinyl carbonyl nucleus of formula: ##STR2## an aroyl nucleus of formula: ##STR3## in which the pair (R.sub.1, R.sub.2) assumes any one of the following values: (CH.sub.3, H), (CH.sub.3, F), (CH.sub.3, NO.sub.2), (CH.sub.3, OH); an aroyl nucleus of formula: ##STR4## in which the set (R.sub.3, R.sub.4, R.sub.5) assumes any one of the following values: (CH.sub.3, NH.sub.2, Br), (CH.sub.3, CH.sub.3 CONH, Br), (CH.sub.3, CF.sub.3 CONH, Br), (CH.sub.3, CH.sub.3 CONH, Cl), (CH.sub.3, CF.sub.3 CONH, Cl), (C.sub.2 H.sub.5, NH.sub.2, Br), (CH.sub.3, NH.sub.2, H), (CH.sub.3, CH.sub.3 O, CH.sub.3 O), (CH.sub.3, CH.sub.3 O, H); an aroyl nucleus polysubstituted by the following groups or atoms: dimethoxy-2,3; dimethoxy-3,5; trimethoxy-2,3,4; methoxy-2 dibromo-3,5 amino-4; or a benzyl nucleus monosubstituted in the meta position of formula: ##STR5## in which R.sub.6 represents a methyl or trifluoromethyl group or a halogen atom, in which case A--CO-- designates the 2-methoxy 4-amino 5-bromo benzoyl nucleus of formula: ##STR6## or a benzyl nucleus monosubstituted in the para position of formula: ##STR7## in which R.sub.7 represents: a methyl or methoxy group or an atom of bromine or chlorine, in which case A--CO-- represents the 2-amino 4-methoxy 5-pyrimidinyl carbonyl nucleus of formula: ##STR8## a lower alkyl or a trifluoromethyl group or an atom of chlorine, bromine or fluorine, in which case A--CO-- represents a 2-methoxy 4-amino 5-bromo benzoyl nucleus, or a 3,4-dichloro benzyl group, a 2-methyl thiophene group ##STR9## or a 3-methyl thiophene group ##STR10## in which case A--CO-- represents a 2-methoxy 4-amino 5-bromo benzoyl nucleus; or a 2-methyl thiophene, a 3-methyl thiophene or a 2-methyl furan group ##STR11## in which case A--CO-- represents a 2-methoxy 4-amino 5-chloro benzoyl nucleus; or a cyclohexylmethyl group, in which case A--CO-- represents a 2-methoxy 4-amino 5-bromo benzoyl nucleus.

It should be noted that in formula (I), the chain A--CO--NH is in the equatorial position and the nor-tropanes having such a substituent in the equatorial position will be called .beta. in what follows.

The present invention comprises of course as well the pharmaceutically acceptable mineral or organic acids addition salts of said compounds.

The compounds of formula (I) are obtained by condensing, by the mixed anhydrides method, the acids of formula:

A--COOH (II) in which A--CO-- has the same meanings as A--CO-- in formula (I), with the corresponding .beta.-3-amino nor-tropanes of formula: ##STR12## in which R has the same meaning as in formula (I).

The compounds of formula (II) complying more precisely with the particular formula: ##STR13## in which R.sub.8 represents a methoxy or an ethoxy group, are new and are obtained by saponification of the compound of formula: ##STR14## in which R.sub.8 has the same meanings as in formula (IIa) and R.sub.9 represents a methyl or ethyl group.

The compounds of formula (IV) in which the couple (R.sub.8, R.sub.9) assumes the following values: (OCH.sub.3, CH.sub.3) and (OC.sub.2 H.sub.5, C.sub.2 H.sub.5) are also new and are obtained by a 3-stage synthesis which consists in treating 2-amino 5-ethoxycarbonyl 4-hydroxy pyrimidine, in solution in a basic organic solvent, such as pyridine, with an acid anhydride (e.g. acetic anhydride), then in reacting the product thus obtained with a chlorinating agent preferably phosphorus oxychloride, and finally in causing to react on the resulting raw product, sodium methylate or ethylate, respectively in solution in methanol or ethanol.

The compound of formula (III) in which R represents the benzyl group is new and results from the reduction, by means of sodium in amyl alcohol, of the oxime of N-benzyl nor-tropine-3 one of formula: ##STR15##

The compounds of formula (III) in which R has the same meanings as in formula (I), with the exception of the benzyl group, are also new and are obtained by a two-stage synthesis which consists in condensing cyclohexylmethyl chloride, 3,4-dichloro benzyl chloride, 2-chloromethyl thiophene, 3-chloromethyl thiophene, 2-chloromethyl furan or the chlorides of formulae: ##STR16## in which R.sub.6 and R.sub.7 have the same meanings as in formula (I), on the compounds of formula: ##STR17## in which R.sub.10 represents the methyl or ethoxy group, this condensation being preferably carried out at reflux in an organic solvent such as acetone, acetonitrile or DMF in the presence of potassium carbonate or triethylamine, then in hydrolyzing the acetyl or carbethoxy group.

The compounds of formula (VII), which are new, are obtained by a two-stage synthesis consisting in treating the compound of formula (III) in which R represents the benzyl group, with acetyl chloride or ethyl chloroformate, in a tetrahydrofuran medium and in the presence of an organic base such as pyridine or triethylamine, then in hydrogenolyzing the product obtained, for example in the presence of palladium on charcoal at 10% in an ethanol medium, at a temperature of 60.degree. C. and at a pressure of 15 bars.

The compounds of formula (I) where the motif A--CO-- represents the group of formula: ##STR18## and wherein R is different from the benzyl group, may also be obtained by condensation of the compounds of formula (VIa) with the compound of formula: ##STR19##

This condensation is preferably carried out in accordance with a process identical to the one used for the synthesis of the compounds of formula (III) where R is different from the benzyl group.

Finally, the compound of formula (VIII), also new, is obtained by hydrogenolysis, preferably in an acid medium, in the presence of palladium on charcoal at 10%, at room temperature, at a pressure of 90 mbars and in an alcohol medium, of the compound of formula: ##STR20##

This latter compound is prepared in accordance with the process described above for the preparation of the compounds of formula (I) �mixed anhydrides method! by condensing acid of formula: ##STR21## with the compound of formula (III) wherein R is a benzyl group.

The acid addition salts of the compounds of formula (I) may be obtained by usual methods. For example the acid, e.g. hydrochloric, oxalic, maleic or fumaric acid, is added to the compounds of formula (I) in base form, in the presence of an appropriate solvent such as ethanol for example.

The following preparations are given by way of examples to illustrate the invention.

EXAMPLE 1

.beta.-3-�(4-amino 5-bromo 2-methoxy)benzoyl!amino N-parafluorobenzyl nor-tropane, chlorhydrate (I)

Code number: 19

To a solution of 8.35 g of 4-amino 5-bromo 2-methoxy benzoic acid (II) in 200 ml of tetrahydrofuran cooled to 0.degree. C., were added 5.18 ml of triethylamine, then 3.5 ml of ethyl chloroformate. After 45 minutes at 0.degree. C., 8.6 g of .beta.-3-amino N-parafluorobenzyl nor-tropane �(III), prepared as in example 5, code No. 103! were added and left to agitate for 3 hours. The solvent was evaporated, the residue taken up in methylene chloride, washed with carbonated water, then with water, dried on sodium sulfate, filtered and the solvent evaporated. The residue was crystallized in isopropyl ether. It was filtered and the precipitate obtained (12.9 g) was dissolved in 150 ml of ethanol; chlorhydric ethanol .perspectiveto.6.5 N was added, the precipitate obtained was filtered, rinsed with ether on the filter and recrystallized in absolute alcohol. 5 g of the expected product were obtained.

Yield: 36%.

Melting point: >265.degree. C.

Molecular weight: 498.82.

Empirical formula: C.sub.22 H.sub.26 BrClFN.sub.3 O.sub.2.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 52.97 5.25 8.42Obtained (%) 52.91 4.93 8.26______________________________________

By the same process, but from the corresponding reagents, the compounds of formula (I) appearing in table I below were obtained.

TABLE I ##STR22## Melting Code Molecular point Yield ELEMENTARY ANALYSIS No. ACO R F orm Empirical formula weight (.degree.C.) (%) % C H N 3 ##STR23## ##STR24## maleate C.sub.25 H.sub.31 N.sub.5 O.sub.6 497.54 217 62 Cal.Obt. 60.3560.08 6.286.25 14.0814.13 8 ##STR25## ##STR26## base C.sub.20 H.sub.24 ClN.sub.5 O.sub.2 401.89 185 62 Cal.Obt. 59.9759.69 6.026.00 17.4317.35 9 " ##STR27## " C.sub.21 H.sub.27 N.sub.5 O.sub.3 397.47 180 65 Cal.Obt. 63.4563.66 6.857.10 17.6217.66 10 " ##STR28## " C.sub.21 H.sub.27 N.sub.5 O.sub.2 381.47 178 71 Cal.Obt. 66.1266.20 7.137.15 18.3678.31 16 ##STR29## ##STR30## " C.sub.22 H.sub.26 BrN.sub.3 O.sub.2 444.36 209 65 Cal.Obt. 59.4659.37 5 .906.00 9.469.66 19 ##STR31## ##STR32## HCl C.sub.22 H.sub.26 BrClFN.sub.3 O.sub.2 498.82 >260 36 Cal.Obt. 5 52.972.91 5.254.93 8.428.26 20 " ##STR33## base C.sub.22 H.sub.25 Br.sub.2 N.sub.3 O.sub.2 523.26 223 67 Cal.Obt. 50.4950.68 4.824.67 8.037.86 21 " ##STR34## " C.sub.23 H.sub.25 BrF.sub.3 N.sub.3 O.sub.2 529.36 165 72 Cal.Obt. 53.9153.85 4.924.68 8.208.05 22 " ##STR35## " C.sub.22 H.sub.25 BrClN.sub.3 O.sub.2 478.81 216 70 Cal.Obt. 55.1855.12 5.265.24 8.788.86 23 " ##STR36## " C.sub.23 H.sub. 28 BrN.sub.3 O.sub.2 458.39 217 71 Cal.Obt. 60.2660.44 6.166.13 9.179.27 24 " ##STR37## " C.sub.23 H.sub.28 BrN.sub.3 O.sub.2 458.39 192 64 Cal.Obt. 60.2660.28 6 .166.41 9.179.23 25 " ##STR38## " C.sub.22 H.sub.25 BrClN.sub.3 O.sub.2 478.81 189 58 Cal.Obt. 55.1855.48 5.265.11 8.788.77 26 " ##STR39## " C.sub.22 H.sub.25 BrFN.sub.3 O.sub.2 462.35 167 55 Cal.Obt. 57.1557.43 5.455.29 9.099.01 27 " ##STR40## " C.sub.22 H.sub.25 Br.sub.2 N.sub.3 O.sub.2 523.26 204 78 Cal.Obt. 50.4950.58 4.82 4.79 8.038.27 28 " ##STR41## " C.sub.22 H.sub.24 BrCl.sub.2 N.sub.3 O.sub.2 513.26 193 76 Cal.Obt. 51.4851.67 4.714.77 8.198.40 29 " ##STR42## " C.sub.20 H.sub.24 BrN.sub.3 O.sub.2 S 450.39 213 54 Cal.Obt. 53.3353.15 5.375.26 9.339.40 30 " ##STR43## " C.sub.24 H.sub.30 BrN.sub.3 O.sub.2 472.41 182 81 Cal.Obt. 61.0160.92 6 .406.45 8.908.98 32 " ##STR44## " C.sub.20 H.sub.24 BrN.sub.3 O.sub.2 S 450.39 220 67 Cal.Obt. 53.3353.40 5.375.44 9.339.31 33 " ##STR45## " C.sub.23 H.sub.25 BrF.sub.3 N.sub.3 O.sub.2 512.36 201 58 Cal.Obt. 53.9253.74 4.924.93 8.208.33 35 " ##STR46## Maleate + 4/5 H.sub.2 O C.sub.26 H.sub.36 BrN.sub.3 O.sub.6 + 4/5 H.sub.2 O 566.48 160 48 Cal.Obt. 53.7653.50 6.526.16 7.237.33 37 ##STR47## ##STR48## HCl C.sub.20 H.sub.25 BrClN.sub.5 O.sub.2 482.81 230 51 Cal.Obt. 49.7549.56 5.225.15 14.5114.58 40 ##STR49## ##STR50## HCl + 1/6 H.sub.2 O C.sub.24 H.sub.29 BrClN.sub.3 O.sub.3 + 1/6 H.sub.2 O 543.88 217 54 Cal.Obt. 52.9953.25 5.815.61 7.737.76 41 ##STR51## " base C.sub.24 H.sub.25 BrF.sub.3 N.sub.3 O.sub.3 540.37 191 90 Cal.Obt. 53.3453.64 4.664.92 7.787.92 42 ##STR52## " " C.sub.24 H.sub.28 ClN.sub.3 O.sub.3 441.94 180 63 Cal.Obt. 65.2264.99 6.396.69 9.519.34 43 ##STR53## " " C.sub.24 H.sub.25 ClF.sub.3 N.sub.3 O.sub.3 495.92 181 63 Cal.Obt. 58.1258.35 5.085.35 8.47 8.60 48 ##STR54## " " C.sub.22 H.sub.25 N.sub.3 O.sub.4 395.44 138 77 Cal.Obt. 66.8266.59 6 .376.55 10.6310.79 49 ##STR55## " " C.sub.22 H.sub.25 N.sub.2 FO.sub.2 368.44 96 81 Cal.Obt. 71.7171.60 6 .847.10 7.607.65 51 ##STR56## " " C.sub.22 H.sub.26 N.sub.2 O.sub.3 366.44 195 57 Cal.Obt. 72.1072.29 7 .157.42 7.657.62 60 ##STR57## " " C.sub.24 H.sub.30 N.sub.2 O.sub.4 410.49 130 73 Cal.Obt. 70.2270.07 7 .37 7.18 6.826.72 61 ##STR58## " HCl + 3/5 H.sub.2 O C.sub.24 H.sub.31 ClN.sub.4 O.sub.2 + 3/5 H.sub.2 O 457.77 220 57 Cal.Obt. 62.9763.26 7.097.11 6.126.08 62 ##STR59## " HCl + 1/5 H.sub.2 O C.sub.22 H.sub.27 ClN.sub.2 O.sub.2 + 1/5 H.sub.2 O 390.51 >260 61 Cal.Obt. 68.2967.78 7.037.36 7.247.46 64 ##STR60## " Base + 2/3 H.sub.2 O C.sub.23 H.sub.28 N.sub.2 O.sub.3 + 2/3 H.sub.2 O 392.48 78 85 Cal.Obt. 70.3870.23 7.507.39 7.147.04 67 ##STR61## " base C.sub.22 H.sub.27 N.sub.3 O.sub.2 365.46 145 47 Cal.Obt. 72.3072.40 7.457.78 11.5011.37 68 ##STR62## " HCl C.sub.23 H.sub.29 ClN.sub.2 O.sub.3 416.93 209 53 Cal.Obt. 66.2566.18 7.017.11 6.726.85 71 ##STR63## ##STR64## base C.sub.20 H.sub.24 ClN.sub.3 O.sub.3 389.87 220 51 Cal.Obt. 61.6161.92 6.216.34 10.7811.02 72 " ##STR65## " C.sub.20 H.sub.24 ClN.sub.3 O.sub.2 S 405.94 227 58 Cal.Obt. 59.1759.15 5.965.91 10.3510.12 73 " ##STR66## " C.sub.20 H.sub.24 ClN.sub.3 O.sub.2 S 405.94 215 47 Cal.Obt. 59.1759.13 5.965.64 10.3510.37 74 ##STR67## ##STR68## HCl + 1.2 H.sub.2 O C.sub.22 H.sub.26 Br.sub.2 ClN.sub.3 O.sub.2 + 1.2 H.sub.2 O 581.35 208 36 Cal.Obt. 45.4545.69 4.924.77 7.237.11 75 ##STR69## " fumarate C.sub.27 H.sub.32 BrN.sub.3 O.sub.6 574.46 212 45 Cal.Obt. 56.4556.45 5.625.74 7.327.33 83 ##STR70## ##STR71## base C.sub.23 H.sub.28 N.sub.2 O.sub.3 380.47 182 91 Cal.Obt. 72.6072.52 7.427.41 7.367.25

EXAMPLE 2

.beta.-3-�5-(2-amino 4-methoxy pyrimidinyl)carbonyl!amino N-parachlorobenzyl nor-tropane (I)

Code number: 8

1st stage: .beta.-3-�5-(2-amino 4-methoxy pyrimidinyl)carbonyl!amino nor-tropane (VIII)

A solution of 148.5 g of maleate of .beta.-3-�5-(2-amino 4-methoxy 4-pyrimidinyl)carbonyl!amino N-benzyl nor-tropane �(I), obtained as in example 1, melting point 185.degree. C., Empirical formula C.sub.20 H.sub.25 N.sub.5 O.sub.2 +1/6H.sub.2 O, elementary analysis: Cal. (%)--C: 64.84--H: 6.89--N: 18.91: Obt. (%)--C: 64.62--H: 6.86--N: 19.35!, in 1,500 ml of alcohol at 50% was hydrogenolyzed in an autoclave at room temperature and at a pressure of 90 mbars, in the presence of 25 g of palladium on charcoal at 10%. It was filtered, the solvent evaporated, the residue crystallized in acetone and recrystallized in alcohol at 90%. 120 g of the desired product were thus isolated.

Yield: 98%.

Melting point: 220.degree. C.

Molecular weight: 412.41.

Empirical formula: C.sub.17 H.sub.25 N.sub.5 O.sub.6 +7/5H.sub.2 O.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 48.69 6.01 16.98Obtained (%) 48.97 6.19 16.84______________________________________

2nd stage: .beta.-3-�5-(2-amino 4-methoxy pyrimidinyl)carbonyl!amino N-parachlorobenzyl nor-tropane (I)

Code number: 8

To a solution of 7 g of succinate of the compound of formula (VIII) previously obtained in 100 ml of acetone were added 9.8 g of potassium carbonate, then 4.28 g of para-chlorobenzyl chloride. Then the mixture was heated to reflux for 39 hours, the solvent was evaporated, the residue was diluted in water and extracted with chloroform. It was dried on sodium sulfate, the solvent was evaporated, the residue was crystallized in isopropyl ether and recrystallized in normal butyl alcohol. 5 g of the expected product were thus obtained.

Yield: 70%.

Melting point: 185.degree. C.

Molecular weight: 401.89.

Empirical formula: C.sub.20 H.sub.24 ClN.sub.5 O.sub.2.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 59.77 6.02 17.43Obtained (%) 59.69 6.00 17.35______________________________________

By the same process, but from the corresponding reagents, the compounds of formula (I) appearing in table I and having code numbers 9, 10, 12 and 37 were obtained.

EXAMPLE 3

5-(2-amino 4-methoxy pyrimidinyl)carboxylic acid (IIa)

Code number: 88

1st stage: 2-amino 4-methoxy 5-methoxycarbonyl pyrimidine (IV)

Code number: 96

50 g of 2-amino 4-hydroxy 5-ethoxycarbonyl pyrimidine were heated to reflux with 40 ml of acetic anhydride in 300 ml of anhydrous pyridine for 2 hours. The reaction medium was then frozen, the precipitate filtered, rinced with acetone and dried. 140 g of the raw product thus obtained (yield 62%) was heated to 60.degree. C. in 900 ml of phosphorus oxychloride for 2 hours. After cooling, 200 ml of ethyl ether were added while stirring; the precipitate formed was then filtered, rinsed with ether, then thrown on 1 kg of ice and neutralised with a solution of sodium bicarbonate while stirring. The precipitate was filtered, rinsed with water and dried. 112 g of this intermediate (yield 81%) were stirred for 2 hours in a solution of sodium methanolate at 0.degree. C., prepared with 46 g of sodium in 800 ml of anhydrous methanol. Once again at the normal temperature, the precipitate was filtered, rinsed with water and dried. 80 g of 2-amino 4-methoxy 5-methoxycarbonyl pyrimidine were obtained.

Yield: 95%.

Melting point: 221.degree. C. (Bu OH).

Chlorhydrate:

Empirical formula: C.sub.7 H.sub.10 ClN.sub.3 O.sub.3.

Molecular weight: 219.631.

Melting point: 260.degree. C.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 38.28 4.59 19.13Obtained (%) 38.28 4.42 19.39______________________________________

By the same process, but from the corresponding reagents, the compound of formula (IV) bearing the code number 97: 2-amino 4-ethoxy 5-ethoxycarbonyl pyrimidine was prepared.

Empirical formula: C.sub.9 H.sub.13 N.sub.3 O.sub.3.

Molecular weight: 211.218.

Melting point: 190.degree. C. (Bu OH).

NMR (DMSO): .delta.ppm; 2 triplets centred at 1.3 ppm 6H (OCH.sub.2 --CH.sub.3); 2 quadruplets centered at 4.3 ppm 4H (O--CH.sub.2 --); 1 group centered at 7.2 ppm 2H (NH.sub.2); 1 singleton centered at 8.5 ppm 1H (heteroatomic).

IR (KBr): .gamma.cm.sup.-1 3370 cm.sup.-1 (NH.sub.2); 1680 cm.sup.-1 ester (COO--C.sub.2 H.sub.5).

2nd stage: 5-(2-amino 4-methoxy pyrimidinyl)carboxylic acid (IIa)

Code number: 88

600 g of 2-amino 4-methoxy 5-methoxycarbonyl pyrimidine prepared in the preceding stage were heated to 65.degree. C. with agitation for 1 hour in a mixture of 1.5 l of methanol and 1.5 l of NaOH at 5%. Once cooled, the reaction medium was poured on 4 l of iced water then acidified to pH=3 under stirring with concentrated hydrochloric acid. The 5-(2-amino 4-methoxy pyrimidinyl)carboxylic acid precipitated, drained, washed with acetone then dried was obtained with a yield of 88.5%.

Hydrated sodium salt

Empirical formula: C.sub.6 H.sub.6 N.sub.3 O.sub.3 Na, 1.25H.sub.2 O.

Molecular weight: 213.810.

Melting point: 260.degree. C.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 33.73 4.01 19.67Obtained (%) 34.05 3.73 19.84______________________________________

By the same process, but from the corresponding reagents, the compound of formula (IIa) appearing in table II and bearing code number 89, is obtained.

TABLE II__________________________________________________________________________ ##STR72## Melt- Molec- ingCode For- Empirical ular point Yield Elementary analysis - NMR spectrum -No. mula R.sub.8 R.sub.9 formula weight (.degree.C.) (%) IR spectrum - Thin layer__________________________________________________________________________ chromatography88 IIa OCH.sub.3 -- C.sub.6 H.sub.6 N.sub.3 O.sub.3 Na 213.81 260 88.5 % C H N + 1.25 H.sub.2 O Cal. 33.73 4.01 19.67 (sodium salt) Obt. 34.05 3.73 19.8489 " OC.sub.2 H.sub.5 -- C.sub.7 H.sub.9 N.sub.3 O.sub.3 183.17 280 76 NMR spectrum (CF.sub.3 COOH) .delta. ppm = 4.75; q; and 1.50; t: OCH.sub.2CH.sub.3 7.5; m; NH.sub.2 8.8; s; (H at 6)96 IV OCH.sub.3 CH.sub.3 C.sub.7 H.sub.10 ClN.sub.3 O.sub.3 219.63 260 95 % C H N (chlorhydrate) Cal. 38.28 4.59 19.13 Obt. 38.28 4.42 19.3997 " OC.sub.2 H.sub.5 C.sub.2 H.sub.5 C.sub.9 H.sub.13 N.sub.3 O.sub.3 211.22 190 92 NMR (DMSO) .delta. ppm = 1.3; 2t; 6 H: 2 CH.sub.3 = 4.3; 2q; 4 H: 2 CH.sub.3 = 7.2; m; 2 H: NH.sub.2 = 8.5; s; 1 H at 6 IR (KBr) bands NH.sub.2 at 3370 cm.sup.-1 and COOC.sub.2 H.sub.5 at 1680__________________________________________________________________________ cm.sup.-1

EXAMPLE 4

.beta.-3-amino N-benzyl nor-tropane, dimaleate (III)

Code number: 98

A suspension of 60 g of N-benzyl nor-tropane oxime (V) in 750 ml of amyl alcohol was heated to 40.degree. C. and 50 g of sodium were introduced at a rate such that the temperature of the reaction mixture rose to 135.degree.-140.degree. C. Then the reaction medium was diluted with 300 ml of water, the organic phase was decanted, and extracted by means of 400 ml of HCl 6 N, and the aqueous phase was washed with isopropyl ether. Then, the aqueous phase was alkalized with concentrated potash, extracted with methylene chloride, dried on sodium sulfate, the solvent was evaporated and the residue distilled. 83 g (yield 59%) of liquid, Eb.sub.0.15 =109.degree.-111.degree. C. was obtained which was added to an acetone solution of maleic acid. The precipitate obtained was filtered and recrystallized in absolute alcohol.

Melting point: 150.degree. C.

Empirical formula: C.sub.22 H.sub.28 N.sub.2 O.sub.8 +4.5H.sub.2 O.

Molecular weight: 462.87.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 57.08 6.45 6.05Obtained (%) 57.14 6.19 5.92______________________________________

NMR spectrum of the base (CDCl.sub.3): .delta.ppm=7.28, m, and 3.53, s, 7H (benzylic); centred on 3.17, m,: 2H (tropanic) at position 1 and 5; centred on 2.82, m,: 1H (tropanic) at position 3; 1.52, s, 2NH.sub.2 protons; between 2.20 and 1.15, m, 8 tropanic protons; (the displacement of the tropanic protons in the presence of Europium salt EU(FOD).sub.3 and particularly of the proton at position 3, as well as the study of the value of the sum of the couplings of the multiplet signal of the proton at 3, in accordance with the law of KARPLUS, showed that proton -3 is at an axial position, this by analogy with the NMR spectra in the presence of Europium of the derivatives .alpha. and .beta.-3-amino tropane).

EXAMPLE 5

.beta.-3-amino N-parafluorobenzyl nor-tropane (III)

Code number: 103

1st stage: .beta.-3-acetamido nor-tropane (VII)

To a solution cooled to 0.degree. C. of 96 g of .beta.-3-amino N-benzyl nor-tropane �(III), code number 98, prepared in example 4! in 70 ml of triethylamine and 900 ml of tetrahydrofuran, were slowly added 28 ml of acetyl chloride. After 12 hours at room temperature 50 ml of water were added, the solvent was evaporated, the remaining aqueous phase was extracted with 200 ml of methylene chloride, washed with water, dried on sodium sulfate and the solvent was evaporated. 80 g of raw product were obtained which were dissolved in 1000 ml of alcohol. 1 ml of hydrochloric alcohol 5 N was added and the solution was hydrogenolyzed in the presence of 8 g of palladium on charcoal at 10% in an autoclave, at a temperature of 60.degree. C. and a pressure of 15 bars. Then, it was filtered, the filtrate evaporated and the residue crystallized in ethyl acetate. 52 g of the expected product were thus obtained.

Yield: 77%.

NMR spectrum (CDCl.sub.3): .delta.ppm=6.38, d, (J=7 Hz), amidic protons (--CO--NH--) (exchangeable); Centred on 4.18, m, 1 tropanic proton at 3; 3.60, m, tropanic protons at 1 and 5; 2.70, s, N--H proton (exchangeable); 1.96, s, 3 acetyl protons (CH.sub.3 CO--); between 2.20 and 1.15, m, 8 tropanic protons.

By the same process, but using ethyl chloroformate (instead of acetyl chloride), .beta.-3-ethoxycarbonylamino or nor-tropane (VII) was obtained.

Melting point: 252.degree. C.

Empirical formula: C.sub.10 H.sub.19 ClN.sub.2 O.sub.2.

Molecular weight: 234.72.

Elementary analysis:

______________________________________ C H N______________________________________Calculated (%) 51.17 8.16 11.94Obtained (%) 50.98 8.05 11.98______________________________________

NMR spectrum (CDCl.sub.3) .delta.ppm=5.55, d, --NH--COO--; 4.08, q, and 1.18, t, (J=7 Hz): --COOCH.sub.2 --CH.sub.3 ; 1.96, s,: NH--; 3.51, m, tropanic protons at 1 and 5; 3.91, m, 1 tropanic proton at 3; centred on 1.72, m, tropanic protons at 2, 4, 6 and 7.

2nd stage: .beta.-3-amino N-p-fluorobenzyl nor-tropane (III)

Code number: 103

A solution of 17 g of .beta.-3-acetamido nor-tropane �(VII) obtained in the preceding stage!, of 21 g of p-fluorobenzyl chloride and of 18 ml of triethylamine in 250 ml of acetone was heated to reflux for 12 hours. Then it was filtered, the filtrate was evaporated, and the residue was dissolved in 200 ml of methylene chloride, washed with water, dried on sodium sulfate and the solvent was evaporated. 21 g of raw product were obtained which was dissolved in 250 ml of sulphuric acid at 10% and the solution was heated to reflux for 24 hours. It was washed with 100 ml of methylene chloride, the aqueous solution was alkalized with concentrated potash, extracted with methylene chloride, dried on sodium sulfate and the solvent was evaporated. 17 g of raw product were obtained, yield 96%, which was used directly in the synthesis of the corresponding compound of formula (I) with code No. 19 and described in example 1.

NMR spectrum (CDCl.sub.3): .delta.ppm=centred on 7.08, m, and 3.52, s, 6H(benzylic); centred on 3.15, m, tropanic protons at 1 and 5; centred on 2.94, m, 1 tropanic proton at 3; between 2.20 and 1.15, m, 8 tropanic protons; 1.11, s, NH.sub.2 (exchangeable).

By the same process, but from .beta.-3-ethoxycarbonylamino nor-tropane (VII) described in the preceding stage, the .beta.-3-amino N-parafluorobenzyl nor-tropane (III) of code number 103 was also obtained.

By the same process, but from the corresponding reagents, the .beta.-3-amino N-nor-tropanes of formula (III) were obtained. Apart from the few compounds of formula (III) given in table III, the majority of the compounds (III) were used raw (after checking by thin layer chromatography) in the synthesis of the corresponding compounds of formula (I).

TABLE III__________________________________________________________________________ ##STR73## Melt- Molec- ingCode Empirical ular point Yield Elementary analysis - NMR spectrum -No. R Form formula weight (.degree.C.) (%) IR spectrum__________________________________________________________________________ Elementary analysis C H N 98 ##STR74## dimale- ate C.sub.22 H.sub.28 N.sub.2 O.sub.8 + 4.5 462.872 O 150 59 Cal. (%) Obt. (%) 57.08 57.14 6.45 6.19 6.05 5.92 NMR (CDCl.sub.3) .delta. ppm = 7.32, m, and 3.48, s, 99 ##STR75## base C.sub.14 H.sub.19 BrN.sub.2 295.22 oil 63 ##STR76## = 3.15, m: H at 1 and 5 = 2.94, m: H at 3 between 2,20 and 1.25, m, H at 2,4,6 and 7, = 1.10, s, NH.sub.2 NMR (CDCl.sub.3) .delta. ppm = 7.51, m, and 3.59, s, 6 H 100 ##STR77## base C.sub.15 H.sub.19 F.sub.3 N.sub.2 284.32 oil 71 ##STR78## = 3.15, m, H at 1 and 5; = 2.92: H at 3; between 2.20 and 1.15, m: H at 2,4,6 and 7 = 1.17, s,: NH.sub.2 NMR (CDCl.sub.3) .delta. ppm = 7.47, m, and 3.58, s, 6 H 101 ##STR79## base C.sub.14 H.sub.19 BrN.sub.2 295.22 oil 52 ##STR80## 3.15, m, and 2.95, m, H at 1,3 and 5 = between 2.20 and 1.50, m, H at 2,4,6 and 7 = 1.42, s,: NH.sub.2 NMR (CDCl.sub.3) .delta. ppm = 7.10, m and 3.55, s,: 6 H 102 ##STR81## base C.sub.14 H.sub.19 FN.sub.2 234.31 oil 66 ##STR82## = 3.15, m, and 2.94, m: H at 1,3 and 5 = between 2.20 and 1.18, m, H at 2,4,6 and 7 = 1.14, s, NH.sub.2 NMR (CDCl.sub.3) .delta. ppm = 7.08, m, and 3.52, s,: 6 H 103 ##STR83## base C.sub.14 H.sub.19 FN.sub.2 234.31 oil 96 ##STR84## = 3.15, m: H at 1 and 5 = 2.94, m: H at 3 = between 2.20 and 1.15, m; H at 2,4,6 and 7 = 1.11, s,: NH.sub.2__________________________________________________________________________

The derivatives of formula (I) were tested on laboratory animals and showed neuroleptic properties.

These properties were demonstrated on mice particularly by the test of antagonism to apomorphine straightening, carried out in accordance with the method described by G. GOURET et alia in J. Pharmacol. (Paris) 1973, 4, 341.

The effective doses 50 (ED 50) obtained by intraperitoneal administration, in accordance with the above-mentioned test, of the derivatives of formula (I) and SULPIRIDE chosen as reference compound, are given in table IV below.

Acute toxicity was studied on mice by intraperitoneal administration, and the estimated lethal doses in accordance with the method described by MILLER and THINTER Proc. Soc. Exper. Biol. Med. 1944, 57, 261, are also shown in table IV.

TABLE IV______________________________________Tested Acute toxicity (mice Apomorphine straighteningcompound LD 50 mg/kg/i.p.) ED 50 (mg/kg/i.p.)SULPIRIDE 170 37______________________________________ 3 300 0.04 8 220 0.035 9 240 0.0110 325 0.03516 240 0.0119 90 0.01020 >400 0.03421 85 0.0722 140 0.02123 >400 0.0724 160 0.0525 100 0.0326 140 0.01127 >400 0.03428 >400 0.1229 180 0.01230 230 0.332 140 0.0533 >400 0.1935 80 0.0737 170 0.1640 130 0.0541 225 0.0342 61 0.0543 120 0.0348 310 0.2149 120 0.0851 140 0.0360 75 0.02761 80 0.0262 60 0.0464 83 0.00867 100 0.03868 47 0.0271 120 0.1172 110 0.0473 170 0.0274 250 0.03575 >400 0.02183 140 0.031______________________________________

As the results given in this table show, the difference between effective doses and lethal doses 50 is sufficient to allow the derivatives of formula (I) to be used in therapeutics.

These latter are particularly prescribed in the treatment of disturbances of the psychism.

They will be administered orally in the form of tablets, pills or capsules containing 50 to 300 mg of active ingredient (3 to 8 per day), in solution form containing 0.1 to 1% of active ingredient (10 to 40 drops once to thrice per day), by parenteral administration in the form of injectable ampoules containing 5 to 100 mg of active ingredient (3 to 8 ampoules per day).

Claims

1. A compound having the formula ##STR85## in which R.sub.10 is methyl or ethoxy, and acid addition salts thereof.

2. A compound having the formula ##STR86## in which R is benzyl, meta-monosubstituted benzyl having the formula ##STR87## in which R.sub.6 is CH.sub.3, CF.sub.3 or halogen, para-monosubstituted benzyl having the formula ##STR88## in which R.sub.7 is CH.sub.3 O, lower alkyl, CF.sub.3 or halogen, 3,4-dichlorobenzyl, 2-methyl thiophene, 3-methyl thiophene, 2-methyl furan or cyclohexylmethyl, and acid addition salts thereof.

3. A compound as claimed in claim 2 in which R is benzyl.

4. A compound as claimed in claim 2 in which R is ##STR89## and R.sub.6 is CH.sub.3, F or Cl.

5. A compound as claimed in claim 2 in which R is ##STR90## and R.sub.6 is CH.sub.3, CF.sub.3 or halogen.

6. A compound as claimed in claim 2 in which R is ##STR91## and R.sub.7 is F, Cl, CH.sub.3 or OCH.sub.3.

7. A compound as claimed in claim 2 in which R is ##STR92## and R.sub.7 is lower alkyl, CF.sub.3 or halogen.

8. A compound as claimed in claim 2 in which R is 3,4-dichlorobenzyl, 2-methyl thiophene, 3-methyl thiophene or 2-methyl furan.

9. A compound as claimed in claim 2 in which R is cyclohexylmethyl.