Synthesis of Cryptophycin 52 Using the Sharpless Asymmetric Dihydroxylation: Diol to Epoxide Transformation Optimized for a Base-Sensitive Substrate
作者:Jian Liang、Eric D. Moher、Richard E. Moore、David W. Hoard
DOI:10.1021/jo9919862
日期:2000.5.1
A synthesis of cryptophycin 52 (2) is reported using a Sharplessasymmetricdihydroxylation (AD) strategy to install the epoxide moiety. The high stereoselectivity of the AD reaction that allows for an efficient means of preparing the epoxide is in contrast to the standard direct epoxidation of cryptophycin substrates, which proceeds with poor diastereoselectivity. Methodology for conversion of the