占吨酮 、
2-[2-[Diethoxy(oxido)phosphaniumyl]-[1,3]dithiolo[4,5-d][1,3]dithiol-5-ylidene]-5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dithiine 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
以18%的产率得到9-[5-(5,6-Dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-ylidene)-[1,3]dithiolo[4,5-d][1,3]dithiol-2-ylidene]xanthene