| abstract |
A process for producing an aromatic unsaturated compound of formula (4) wherein Ar represents an optionally substituted aromatic group or an optionally substituted heteroaromatic group, and Y represents an alkoxycarbonyl group having 2 to 9 carbon atoms, an aryloxycarbonyl group having 7 at 13 carbon atoms, an aralkyloxycarbonyl group having 8 to 14 carbon atoms, or a cyano group; which comprises reacting (a) a compound of formula (1) Ar-H (1) wherein Ar has the same meaning defined above with (b) a compound of formula (2) where Y has the same meaning defined above, and Z represents a C1 to C4 alkoxy, or compound of formula (3) wherein Y and Z have the same meaning defined above, in the presence of (c) an acid or compound selected from phosphorus oxyhalide, phosphorus halide, halide of thionyl and sulfuryl halide. |