ES356117A1 - Procedure for the preparation of aromatic compounds. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Process for the preparation of aromatic compounds containing, at least once, a benzene ring of an aromatic carbocyclic cyclic system, linked in conjugation with another aromatic cyclic system by a double ethylenic bond, characterized by being reacted: A) a schiff base of an aromatic aldehyde with B) methyl groups of a compound containing at least one aromatic carbocyclic hexagonal ring, which 1) comprises one to four methyl groups linked to carbon atoms of a benzene ring and 2) comprises exclusively hexagonal carbocyclic aromatic rings, Besides that 3) benzene rings whose methyl groups are to be reacted must be free of other substituents containing replaceable hydrogen atoms by alkali metal, 4) this aromatic compound containing carbocyclic hexagonal rings consists of A) or a benzene ring, B) or of a condensed cyclic benzene system, which contains benzene ring rings linearly or angularly, C) either of several benzene rings, or condensed cyclic benzene systems, bound by simple c-c bonds, D) or represents an arrangement of several benzene rings or condensed benzene cyclic systems containing at least one linkage by means of an unsaturated chain of carbon atoms in which 2 or 4 carbon atoms are counted and which enables a conjugation transmitted from ring to ring, a reaction that is carried out in the presence of a strongly basic alkaline compound and using as an reaction medium an acylamide of the formula [(alkyl) 2 n] w - acyl Where the concept of "alkyl" represents a lower alkyl group, The concept "acyl" represents the radical of a lower aliphatic carboxylic acid or phosphoric acid and W represents the basicity of the acid, And in case alkali hydroxides are strongly alkaline, these alkali hydroxides must have a water content of at most 25%. (Machine-translation by Google Translate, not legally binding)