1-O-[2-[1-[(8'aS)-8'a-methylspiro[1,3-dithiolane-2,6'-3,4,7,8-tetrahydronaphthalene]-1'-yl]ethenoxy-diphenylsilyl]oxyethyl] 6-O-methyl (2E,4E)-2-methylhexa-2,4-dienedioate 在
potassium carbonate 作用下,
以
甲苯 为溶剂,
反应 49.0h,
生成 methyl (1R,2R,4aR,4bR,10aR)-1-[(E)-3-methoxy-3-oxoprop-1-enyl]-2,4b-dimethyl-4-oxospiro[1,3,4a,5,6,9,10,10a-octahydrophenanthrene-7,2'-1,3-dithiolane]-2-carboxylate