A Practical and Improved Synthesis of (3<i>S</i>,5<i>S</i>)-3-[(<i>tert</i>-Butyloxycarbonyl)methyl]- 5-[(methanesulfonyloxy)methyl]-2- pyrrolidinone
作者:Nathan K. Yee、Yong Dong、Suresh R. Kapadia、Jinhua J. Song
DOI:10.1021/jo020433f
日期:2002.11.1
A practical and improved synthesis of (3S,5S)3- [(tert-butyloxycarbonyl)methyl]-5-[(methanesulfonyloxy)methyl]-2-pyrrolidinone (1) is described. The key transformations involve a highly efficient reaction sequence consisting of ethoxycarbonylation, alkylation, hydrolysis, and decarboxylation to produce compound 10. The process described herein is practical, robust, and cost-effective, and it has been successfully implemented in a pilot plant to produce a multikilogram quantity of mesylate 1.