Early Development Scale-Up of a Novel CXCR Antagonist: Focus on Racemic and Stereoselective Routes of a Key Intermediate
作者:Samuel Tabet、Nicolas Rodeville、Arnaud Mathieu、Catherine Raffin、Corinne Millois-Barbuis、Branislav Musicki、Franck Muller、Thibaud Gerfaud、Jean-Guy Boiteau、Isabelle Cardinaud
DOI:10.1021/acs.oprd.7b00325
日期:2017.12.15
Efforts toward a convenient and scalable process for the synthesis of a novel CXCR antagonist 1 are described, with a specific focus on a chiral key intermediate. Two generations of a racemic route have been developed for short-term deliveries, and a stereoselective process has been devised for longer term plans. Key steps involved an enzymatic resolution of racemic tetrahydrothiophene-2-carboxylic
描述了对合成新型CXCR拮抗剂1的方便且可扩展的方法的努力,特别着重于手性关键中间体。已经开发出两代外消旋路线用于短期交付,并且已经为长期计划设计了立体选择过程。关键步骤涉及外消旋四氢噻吩-2-羧酸的酶促拆分,以建立(2 R)立体中心,在氮气流下温和有效地制备位阻亚氨嘧啶,及其立体选择性还原以建立(1 S)胺立体中心。对于外消旋方法,该过程已扩大到几千克规模,而立体选择性路线已在多克规模上得到证明。