Synthesis for the preparation of tetracyclic compounds

Details Synthesis for the preparation of tetracyclic compounds Synthesis for the preparation of tetracyclic compounds

C - Chemistry, Metallurgy

07

D

260/251, 260/241

C07D 239/04 (2006.01) C07D 241/04 (2006.01) C07D 295/096 (2006.01) C07D 487/04 (2006.01)

Patent

CA 1084490

Abstract of the Disclosure. The invention relates to a new synthesis for the preparation of tetracyclic compounds of the general formula: Image I as well as the pharmaceutically acceptable salts thereof, in which: n is the number 1 or 2, m is the number 1, if n = 2 and the number 2, if n = 1, R1 and R2 stand for hydrogen, hydroxy, halogen, lower alkyl (1-4 C), lower alkoxy (1-4 C) or tri- fluoromethyl and R3 represents hydrogen, alkyl (1-6 C), aralkyl (7-10 C) or an amino alkyl group (1-6 C), in which the nitrogen atom has been substituted by two alkyl groups (1-4 C), or the nitrogen atom forms part of a heterocyclic 5- or 6- membered ring, having valuable biological properties.

219742

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