Patent GB-1163969-A (GB)
Title: Novel Tricyclic Amines and a Process for the Manufacture Thereof
IPC: C07C13/547
Filed: 1967-03-16
Abstract: 1,163,969. Dibenzocycloheptene derivatives. F. HOFFMANN-LA ROCHE & CO. A.G. 16 March, 1967 [17 March, 1966], No. 12324/67. Heading C2C. [Also in Division C5] The invention comprises compounds of the Formula I, wherein R<SP>1</SP> represents an alkyl C 2-4  alkenyl or benzyl group, R<SP>2</SP> represents a halogen atom and each of R<SP>3</SP> and R<SP>4</SP> represents an alkyl group or R<SP>3</SP> and R<SP>4</SP> together represent an alkylene, oxa-alkylene or aza-alkylene chain, which, together with the nitrogen atom to which it is attached, forms a 5- or 6-membered ring and wherein the broken line denotes that the atom attached thereby is optional and pharmaceutically acceptable acid addition salts thereof and their preparation by dehydrating an alcohol of the Formula II or III or by reacting a compound of the Formula IV with an amine of the formula R 3 NH[H or R<SP>4</SP>] where R<SP>5</SP> represents an alkylidene or aralkylidene group, A- represents the anion of an acid one of X and Y represents a hydrogen atom and the other a hydroxyl group and B represents a vinyl or haloethyl group, and, in either case, if desired, dealkylating any dehydration or reaction product in which R<SP>4</SP> is present and represents an alkyl group and, also if desired, converting the dehydration, reaction or dealkylation product as the case may be into a pharmaceutically acceptable acid addition salt thereof and, if desired, geometric isomers may be separated using known method. Alcohols of the Formula II wherein X represents a hydroxyl group and Y represents a hydrogen atom may be prepared from the appropriate 10 - substituted - dibenzo[a,d]cyclohepten-5-one by reaction with a metal derivative of the appropriate 3-aminopropyl halide, with a metal derivative of the appropriate 3- aminoprop-1-yne followed by reduction of the triple bond in the resulting 5-hydroxy-5-aminoprop - 1 - ynyl - dibenzo[a,d]cycloheptene or with the appropriate 3-aminopropylhalide in the presence of sodium metal. The 10- (alkyl-, alkenyl or benzyl) -dibenzo[a,d]- cyclohepten-5-ones referred to above may be prepared by reacting a ketal of 10-bromodibenzo[a,d]cyclohepten-5-one with a metal derivative of an alkyl, alkenyl or benzyl halide and splitting off the ketal group from the resulting 10-substituted-dibenzo[a,d]cycloheptene derivative. Alcohols of the Formula II where X represents a hydrogen atom and Y represents a hydroxyl radical may be prepared by reacting the above mentioned ketones with an ethyl-metal halide, dehydrating the resulting 5-hydroxy-5-ethyl-dibenzc[a,d]cycloheptene to give the corresponding 5-ethylidene compound, oxidizing the latter to the 5-acetyl derivative and converting this with formaldehyde and an amine to the corresponding 5-aminoethyl carbonyl compound followed by reduction to the required alcohol. Quaternary ammonium compounds of the Formula III may be prepared by reacting the above mentioned ketone with a 3-aminopropyl halide in the presence of sodium metal reacting the resulting 5-hydroxy-5-aminopropyl compound with an alkanol or aralkanol and quaternizing the resulting Schiff's base. Propenylidene derivatives of the Formula IV may be prepared from the above mentioned ketones by reaction with an allyl-metal halide and dehydrating the resulting 6-hydroxy-5- propen-2-yl compound. 5 - Halopropylidene - dibenzocycloheptenes of the Formula IV may be prepared by reacting a 10- or 11 -halo-dibenzocyclohepten-5-one with an etherified 3-hydroxypropyl halide and hydrolysing the product to the carbinol or by reacting said ketone with an etherified 3-hydroxypropyne, hydrolysing the product and reducing the triple bond in the resulting compound, dehydrating the carbinol produced by either of the above processes, replacing the 10- or 11- substituted halogen atom by an alkyl, alkenyl or benzyl group and replacing the ether group of the resultant etherified 3-hydroxypropylidene derivative by a halogen atom. The same compounds may be made by a similar process but starting with a 10-alkyl, alkenyl or benzyldibenzocyclohepten-5-one. 5 - Halopropylidene - dibenzocycloheptenes of the Formula IV may also be prepared by reacting the appropriate dibenzocycloheptenones with a metal derivative of a cyclopropyl halide and reacting the resulting 5-hydroxy-5- cyclopropyl compound with a concentrated hydrohalic acid and by the addition of a hydrogen halide to a propenylidene derivative of the Formula IV. Therapeutic compositions having antidepressant properties, in forms suitable for oral or parenteral administration comprise the compounds of the invention together with a suitable carrier.