methyl 6',11'-diacetoxy-1',2',3',4',5',5a',6',11',11a',12'-decahydro-5',12'-dioxospiro<1,3-dithiolan-2,1'-naphthacene>-3'-carboxylate 在
氮 作用下,
以
邻二甲苯 为溶剂,
反应 20.0h,
以to give 24 mg (97%) of methyl rac-1',2',3',4',5',12'-hexahydro-5',12'-dioxospiro[1,3-dithiolane-2,4'-naphthacene]-2'-carboxylate in the form of a bright yellow solid of melting point 216° C.的产率得到methyl rac-1',2',3',4',5',12'-hexahydro-5',12'-dioxospiro[1,3-dithiolane-2,4'-naphthacene]-2'-carboxylate