Rapid Assembly of Saturated Nitrogen Heterocycles in One-Pot: Diazo-Heterocycle “Stitching” by N-H Insertion and Cyclization
作者:Alexander J. Boddy、Dominic P. Affron、Christopher J. Cordier、Emma L. Rivers、Alan C. Spivey、James A. Bull
DOI:10.1002/anie.201812925
日期:2019.1.28
Methods that provide rapid access to new heterocyclic structures in biologically relevant chemical space provide important opportunities in drug discovery. Here, a strategy is described for the preparation of 2,2‐disubstituted azetidines, pyrrolidines, piperidines, and azepanes bearing ester and diverse aryl substituents. A one‐pot rhodium catalyzed N–H insertion and cyclization sequence uses diazo
在生物学相关化学空间中提供快速进入新杂环结构的途径的方法为药物发现提供了重要机会。在这里,描述了制备带有酯和各种芳基取代基的2,2-二取代氮杂环丁烷,吡咯烷,哌啶和氮杂环丙烷的策略。一锅铑催化的N–H插入和环化序列使用重氮化合物将线性1,m-卤代胺(m= 2–5),以优异的产率快速组装4、5、6和7元饱和氮杂环。证实了超过五十个实例,包括具有衍生自生物活性化合物的重氮化合物的实例。可以对产物进行功能化以提供α,α-二取代氨基酸,并将其用于片段合成。