AuCl-catalyzed benzannulation of o-alkynyl(oxo)benzenes with benzenediazonium 2-carboxylate proceeds under mild conditions and a variety of anthracene derivatives, having a ketone group at the 9-position, are produced in good to high yields. The reaction proceeds most probably through the [4+2] cycloaddition between benzyne and benzopyrylium auric ate complex, which would be generated by the gold-induced electrophilic
[结构:见正文]在温和的条件下,AuCl催化邻炔基(氧代)苯与2-重氮苯重氮的苯环合反应,可制得各种在9位具有酮基的
蒽衍
生物。高产。该反应最可能通过苯并与苯并
吡啶鎓
金酸酯配合物之间的[4 + 2]环加成而进行,这是由
金诱导的邻炔基(氧代)苯的亲电环化反应生成的。