[EN] PREPARATION OF MAYTANSINOID ESTERS<br/>[FR] PRÉPARATION D'ESTERS DE MAYTANSINOÏDE
申请人:BIO THERA SOLUTIONS LTD
公开号:WO2014094354A1
公开(公告)日:2014-06-26
Provided are efficient methods for direct coupling of a maytansinoid with a carboxylic acid to prepare a maytansinoid C-3 ester in high yield using a rare earth metal-based or trifluoromethanesulfonate-based Lewis acid catalyst and a base together with a coupling reagent. Also provided are compositions used in such methods.