Stereoselective Syntheses of the Antihistaminic Drug Olopatadine and Its <i>E</i>-Isomer
作者:Joan Bosch、Jordi Bachs、Antonia M. Gómez、Rosa Griera、Marta Écija、Mercedes Amat
DOI:10.1021/jo300925c
日期:2012.7.20
Practical stereoselective synthetic routes to the antihistaminic drug olopatadine and its E-isomer have been developed, the key steps being a trans stereoselective Wittig olefination using a nonstabilized phosphorus ylide and a stereoselective Heck cyclization. The stereoselectivity of the Wittig reaction depends on both the phosphonium salt anion and the cation present in the base used to generate
已经开发出抗组胺药物奥洛他定及其E-异构体的实用的立体选择性合成路线,关键步骤是使用不稳定的磷内酯和立体选择性Heck环化进行反式立体选择性Wittig烯化反应。Wittig反应的立体选择性取决于the盐阴离子和存在于用于产生叶立德的碱中的阳离子。