Synthesis of Highly Potent N-10 Amino-Linked DNA-Alkylating Indolinobenzodiazepine Antibody–Drug Conjugates (ADCs)
作者:Katie E. Archer、Emily E. Reid、Manami Shizuka、James Woods、Luke Harris、Erin K. Maloney、Laura M. Bartle、Olga Ab、Alan Wilhelm、Yulius Setiady、Jose F. Ponte、Rajeeva Singh、Thomas A. Keating、Ravi V. J. Chari、Michael L. Miller
DOI:10.1021/acsmedchemlett.9b00254
日期:2019.8.8
Indolinobenzodiazepine DNA alkylators (IGNs) are the cytotoxic payloads in antibody-drug conjugates (ADCs) currently undergoing Phase I clinical evaluation (IMGN779, IMGN632, and TAK164). These ADCs possess linkers that have been incorporated into a central substituted phenyl spacer. Here, we present an alternative strategy for the IGNs, linking through a carbamate at the readily available N-10 amine present in the monoimine containing dimer. As a result, we have designed a series of N-10 linked IGN ADCs with a wide range of in vitro potency and tolerability, which may allow us to better match an IGN with a particular target based on the potential dosing needs.