三正丁基氢锡 、
(3R,4S,5R) methyl 2-<(butyldimethylsilyl)oxy>-4,5-isopropylidenedioxy-5-methyl-3-<(prop-2-ynyl)oxy> cyclohex-1-ene-1-carboxylate 在
偶氮二异丁腈 作用下,
以
甲苯 为溶剂,
以92%的产率得到(3E,3aS,4RS,6R,7S,7aR)-methyl-3a-[(t-butyldimethylsilyl)oxy]-6,7-isopropylidenedioxy-6-methyl-3-[(tributylstannyl)methylidene]octahydrobenzofuran-4-carboxylate