A New Flow Methodology for the Expedient Synthesis of Drug‐Like 3‐Aminoindolizines
作者:Paul P. Lange、Andrew R. Bogdan、Keith James
DOI:10.1002/adsc.201200316
日期:2012.9.17
A flow‐based synthesis of diversely functionalized indolizines and their aza‐analogues is described. These drug‐like heterocycles were generated via a tandem Sonogashira/cycloisomerization sequence, starting from widely available 2‐bromopyridines and alkynes, employing a simple catalyst system together with 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) as base. The use of flow technology allows a straightforward
描述了基于流量的功能多样的吲哚嗪及其氮杂类似物的合成。这些类药物杂环是通过串联的Sonogashira /环异构化序列生成的,从广泛使用的2-溴吡啶和炔烃开始,采用简单的催化剂体系以及1,8-二氮杂双环[5.4.0] undec-7-ene(DBU)作为基础。流动技术的使用允许直接,快速地获得各种新型化合物,并实现从毫克级到克级的线性放大,而不会降低收率。