Development of a Multikilogram Synthesis of a Chiral Epoxide Precursor to a CCR1 Antagonist. Use of in Situ Monitoring for Informed Optimisation via Fragile Intermediates
作者:Debra Ainge、James E. M. Booker、Nicholas Pedge、Rhona Sinclair、Chris Sleigh、Marijan Štefinović、Luis-Manuel Vaz、Edward Way
DOI:10.1021/op900172t
日期:2010.1.15
up of a manufacturing route to a key intermediate, acetic acid 4-acetylamino-3-(2-methyl-oxiranylmethoxy)phenyl ester (2), utilising a SNAr coupling, the hydrogenation of a nitro moiety and the conversion of a chiral acetonide into a chiral epoxide is described along with other routes to access intermediate 2 including the chemoselective reduction of a nitro moiety in the presence of an epoxide.
利用S N Ar偶合,硝基部分的加氢和乙酸的最优化和规模化生产关键中间体乙酸4-乙酰氨基-3-(2-甲基-环氧乙烷基甲氧基)苯基酯(2)的方法。描述了手性丙酮化物向手性环氧化物的转化以及进入中间体2的其他途径,包括在环氧化物的存在下硝基部分的化学选择性还原。