NOVEL SYNTHESIS OF 2,3-DIARYLBUTA-1,3-DIENES FROM 1,4-DIMETHOXYBUTYNE-2
It was found that 2,3-diarylbuta-1,3-dienes were readily obtained in good to excellent yields through the SN-2' type substitution of 1,4-dimethoxybutyne-2 with aryl Grignard reagents in the presence of a copper(I) salt.