9,9-dichloro-9H-thioxanthene-2-carboxylic acid cyclohexyl ester 在
铜 作用下,
以
对二甲苯 为溶剂,
反应 12.0h,
生成 cis-cyclohexyl 9-{2-[(cyclohexyloxy)carbonyl]-9H-thioxanthen-9-ylidene}-9H-thioxanthene-2-carboxylate 、 trans-cyclohexyl 9-{2-[(cyclohexyloxy)carbonyl]-9H-thioxanthen-9-ylidene}-9H-thioxanthene-2-carboxylate