2-[2-(5,6-Dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-ylidene)-ethylidene]-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester 在
lithium bromide 作用下,
以
六甲基磷酰三胺 为溶剂,
以75%的产率得到2-[2-(5,6-Dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-ylidene)-eth-(Z)-ylidene]-[1,3]dithiole-4-carboxylic acid methyl ester