(E)-methyl 2-(cyanomethyl)-4-((1R,2R,8aS)-5,5,8a-trimethyl octahydro-1H-spiro[naphthalene-2,2'-oxiran]-1-yl)but-2-enoate 在
二氯二茂钛 、
锌 、
sodium dihydrogenphosphate 作用下,
以
四氢呋喃 为溶剂,
反应 12.5h,
以60%的产率得到(6aR,1aR,11bS)-methyl 6a-(hydroxymethyl)-4,4,11b-trimethyl-7-oxo-2,3,4,4a,5,6,6a,7,8,11,11a,11b-dodecahydro-1H-cyclohepta[a]naphthalene-9-carboxylate