Patent ID: 7939674

Claim:
A process for producing an aromatic unsaturated compound of the formula (4) wherein Ar represents an optionally substituted aromatic group or an optionally substituted heteroaromatic group, and Y represents an electron withdrawing group, which comprises reacting (a) a compound of the formula (1) Ar—H (1) wherein Ar has the same meaning as defined above with (b) a compound of the formula (2) wherein Y has the same meaning as defined above, and Z represents a lower alkoxy, or a compound of the formula (3) wherein Y and Z have the same meanings as defined above, in the presence of (c) an acid or a compound which generates a mineral acid by its hydrolysis, and wherein the reaction is conducted in acetic acid; and wherein Y is an alkoxycarbonyl group, an aryloxycarbonyl group, an aralkyloxycarbonyl group or a cyano group.