Convenient Formal Synthesis
of (+)-Grandisol through Lewis Acid Promoted Enantioselective
Pinacolic Rearrangement
作者:Pier Piras、Angelo Frongia、Christian Girard、Jean Ollivier、Francesco Secci
DOI:10.1055/s-0028-1083536
日期:——
cyclopropanation of an easily prepared chiral a-siloxylactone leads efficiently to an enantiomerically pure cyclopropanol derivative. The trimethylsilyl trifluoromethane sulfonate induced pinacol rearrangement allows high level of chirality transfer into a cyclobutanone, which is a useful intermediate in the total synthesis of (+)-grandisol.
容易制备的手性α-甲
硅烷氧基内酯的
钛介导的
环丙烷化有效地产生对映体纯的
环丙醇衍
生物。三甲基甲
硅烷基三
氟甲烷磺酸酯诱导
频哪醇重排允许高
水平的手性转移到
环丁酮中,
环丁酮是 (+)-格兰地醇全合成中的有用中间体。