I<sub>2</sub>–DMSO–PTSA: a simple and metal free oxidative cross coupling of imidazo[1,2-a]pyridines and methylketones
作者:Madhu Chennapuram、Narender Reddy Emmadi、Chiranjeevi Bingi、Krishnaiah Atmakur
DOI:10.1039/c4ra15835k
日期:——
simple, highly efficient and selective oxidative cross coupling of imidazo[1,2-a]pyridine (IP) compounds (1) and methylketones (2), promoted by molecular iodine in DMSO in the presence of a catalytic amount of PTSA has been realized in a one pot reaction. This strategy has provided a general route for the synthesis of 1-aryl-2-(2-phenylimidazo[1,2-a]pyridin-3-yl)ethane-1,2-diones (3) with a new C–C bond
在催化量的PTSA存在下,由分子碘在DMSO中促进的咪唑并[1,2- a ]吡啶(IP)化合物(1)和甲基酮(2)的简单,高效且选择性的氧化交叉偶联已经被发现。一锅反应。该策略为用新的CC合成1-芳基-2-(2-苯基咪唑并[1,2 - a ]吡啶-3-基)乙烷-1,2-二酮(3)提供了一般路线。通过Kornblum氧化形成键,然后在原位形成的苯乙二醛上进行IP化合物(1)的亲核攻击。简单的反应条件,无金属催化剂和选择性的产物形成是该方案的优点。