[(1'R,3'aS,6'S,9'aS)-4'-oxo-6'-prop-1-en-2-ylspiro[1,3-dithiolane-2,8'-2,3,3a,5,6,7,9,9a-octahydro-1H-cyclopenta[8]annulene]-1'-yl] 2,2-dimethylpropanoate 、
碘甲烷 在
potassium hydride 作用下,
以
四氢呋喃 为溶剂,
以70%的产率得到[(1R,3aS,6S,9aS)-3a-methyl-4-oxo-6-prop-1-en-2-ylspiro[1,2,3,5,6,7,9,9a-octahydrocyclopenta[8]annulene-8,2'-1,3-dithiolane]-1-yl] 2,2-dimethylpropanoate