环庚三烯酚酮 、
dimethyl 7-bicyclo<2.2.1>hepta-2,5-diene-2,3-dicarboxylate 以
甲苯 为溶剂,
反应 336.0h,
以41%的产率得到rac-dimethyl (1R,4S,4aR,5R,9S,9aR)-12-(bis(methylthio)methylene)-5-hydroxy-6-oxo-4,4a,5,6,9,9a-hexahydro-1H-5,9-etheno-1,4-methanobenzo[7]annulene-2,3-dicarboxylate