ethyl (E)-3-[(2R,5S,6S,9R)-2-tert-butyl-8-[[tert-butyl(diphenyl)silyl]oxymethyl]-9-methyl-4-oxo-1,3-dioxaspiro[4.5]dec-7-en-6-yl]-2-methylprop-2-enoate 在
L-Selectride 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以85%的产率得到1,3-Dioxaspiro[4.5]dec-7-en-4-one,2-(1,1-dimethylethyl)-8-[[[(1,1-dimethylethyl)diphenylsilyl]oxy]methyl]-6-[(1E)-3-hydroxy-2-methyl-1-propenyl]-9-methyl-, (2R,5S,6R,9R)-