Synthesis of Partially Reduced Imidazo[1,2-a]pyridines through an Unprecedented Base-Mediated (4+2) Cyclization
作者:Ramendra Pratap、Rahul Panwar、Surjeet Singh、Pratik Yadav、Ranjay Shaw、Abhinav Kumar
DOI:10.1055/s-0036-1588943
日期:——
A water-mediated regioselective synthesis of 6,7-diaryl-5-oxo-2,3,5,6-tetrahydroimidazo[1,2-a]pyridine-6-carbonitriles was performed by the reaction of 2-[1-cyano-2,2-bis(methylsulfanyl)vinyl]benzonitrile with 1-aryl-2-(imidazolidin-2-ylidene)ethanones under basic conditions. This reaction involves an unprecedented (4+2) annulation.
6,7-diaryl-5-oxo-2,3,5,6-tetrahydroimidazo[1,2-a]pyridine-6-carbonitriles 的水介导区域选择性合成是通过 2-[1-cyano -2,2-双(甲基硫烷基)乙烯基]苄腈与1-芳基-2-(咪唑烷-2-亚基)乙酮在碱性条件下。该反应涉及前所未有的 (4+2) 环化。