5,8,5',8'-Tetraacetoxy-[2,2']bi[benzo[b][1,3]dithiolo[4,5-e][1,4]dithiinylidene]-6,7,6',7'-tetracarboxylic acid tetramethyl ester 、 alkaline earth salt of/the/ methylsulfuric acid 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成
Dimethyl 2-[6,7-bis(methoxycarbonyl)-5,8-bis(3-nonyldodecoxy)-[1,3]dithiolo[4,5-b][1,4]benzodithiin-2-ylidene]-5,8-bis(3-nonyldodecoxy)-[1,3]dithiolo[4,5-b][1,4]benzodithiine-6,7-dicarboxylate