Straightforward Synthesis of Various 2,3-Diarylimidazo[1,2-<i>a</i>]pyridines in PEG<sub>400</sub>Medium through One-Pot Condensation and C-H Arylation
作者:Marie-Aude Hiebel、Yacoub Fall、Marie-Christine Scherrmann、Sabine Berteina-Raboin
DOI:10.1002/ejoc.201402079
日期:2014.7
PEG400 is described herein as a suitable medium for the condensation of various 2-amino pyridines with α-bromo ketones. 2-Arylimidazo[1,2-a]pyridines were synthetized in a short time through microwave irradiation in moderate to excellent yields. After optimization, a convenient one-pot process enabled access to 2,3-diarylimidazo[1,2-a]pyridines by using a reduced amount of palladium catalyst without
PEG400在本文中被描述为用于各种2-氨基吡啶与α-溴酮缩合的合适介质。2-芳基咪唑并[1,2-a]吡啶通过微波辐射在短时间内以中等至优异的产率合成。优化后,方便的一锅法可以通过在相同的环境无害介质中使用减少量的不含配体的钯催化剂来获得 2,3-二芳基咪唑并[1,2-a]吡啶。