Optically active cyclobutanones and γ-butyrolactones from asymmetric alkylidenecyclopropanes
作者:Timour Chevtchouk、Jean Ollivier、Jacques Salaün
DOI:10.1016/s0957-4166(97)00077-3
日期:1997.4
Epoxidation of (E)-(2S)-pentylidene(2-methylcyclopropane) 1 by MCPBA gave a 70:30 mixture of diastereomeric oxaspiropentanes 2 and 3, which underwent lithium iodide induced ring expansion and Baeyer Villiger oxidation to produce the Quercus lactone a (>92% eel. (C) 1997 Elsevier Science Ltd.