Rhodium-Catalyzed Regioselective Direct C-H Amidation of 2,4-Diarylquinazoline with Sulfonyl Azides: An Example of Steric Hindrance Regulated Mono- and Diamidation Selectivity
作者:Chunyan Zhang、Yirong Zhou、Zhihong Deng、Xin Chen、Yiyuan Peng
DOI:10.1002/ejoc.201403477
日期:2015.3
An unprecedented steric hindrance controlled regioselective rhodium-catalyzed direct C–H amidation of 2,4-diarylquinazoline was described. Sulfonyl azides were used as the amine source to provide a variety of amide-functionalized 2,4-diarylquinazolines in high efficiency. The reaction proceeded under mild conditions, had good functional group tolerance with a broad scope of substrates, and afforded
描述了一种前所未有的空间位阻控制的区域选择性铑催化直接 C-H 酰胺化 2,4-二芳基喹唑啉。磺酰基叠氮化物用作胺源以高效提供各种酰胺官能化的 2,4-二芳基喹唑啉。该反应在温和的条件下进行,具有良好的官能团耐受性和广泛的底物范围,并提供中等至良好的产物收率。在间位取代基的帮助下实现了优异的单酰胺化选择性。