作者:Toshihiko Onoda、Ryuichi Shirai、Nobuyuki Kawai、Shigeo Iwasaki
DOI:10.1016/0040-4020(96)00792-2
日期:1996.10
We have developed a versatile method for the synthesis of enantiomerically pure cis-2-methylcyclopropanecarboxylic acid (−)-2, a component of curacin A, and its enantiomer, (+)-2. Double-asymmetric Simmons-Smith cyclopropanation of the dienes 5 and 9 derived from diethyl L-tartrate proceeded with excellent diastereofacial selectivity (>99% de) to give the dicyclopropanes 6 and 10, which were converted
我们已经开发了一种通用的方法,用于合成对映体纯的顺式-2-甲基环丙烷甲酸(-)- 2(姜黄素A的成分)及其对映体(+)- 2。衍生自L-酒石酸二乙酯的二烯5和9的双不对称Simmons-Smith环丙烷化以优异的非对映选择性(> 99%de)进行,得到了二环丙烷6和10,它们都转化为2的对映异构体。