2-[7-(5,6-Dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-ylidene)-7H-furo[3,4-b]pyrazin-5-ylidene]-[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93%的产率得到5-(5,6-Dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-ylidene)-7-[1,3]dithiol-2-ylidene-5,7-dihydro-furo[3,4-b]pyrazine