CYTOTOXIC AGENTS COMPRISING NEW ANSAMITOCIN DERIVATIVES
申请人:ImmunoGen, Inc.
公开号:US20160058882A1
公开(公告)日:2016-03-03
New ansamitocin derivatives bearing a linking group are disclosed. Also disclosed are methods for the synthesis of these new ansamitocin derivatives and methods for their linkage to cell-binding agents. The ansamitocin derivative-cell-binding agent conjugates are useful as therapeutic agents, which are delivered specifically to target cells and are cytotoxic. These conjugates display vastly improved therapeutic efficacy in animal tumor models compared to the previously described agents.
[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.
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.