Iridium-Catalyzed Aryl C–H Sulfonamidation and Amide Formation Using a Bifunctional Nitrogen Source
作者:Meng Yu、Tao Zhang、Hitesh B. Jalani、Xunqing Dong、Hongjian Lu、Guigen Li
DOI:10.1021/acs.orglett.8b01977
日期:2018.8.17
A new strategy for the sequential formation of aryl and amidyl C–N bonds is reported. Using trichloroethoxysulfonyl azide as a bifunctional nitrogensource, Ir-catalyzed aryl C–H sulfonamidation and subsequent desulfonative amide formation proceed effectively without any need of oxidants or coupling reagents. This protocol is suitable for readily available benzamides and stable carboxylates including
Rapid synthesis of 2,3-disubstituted-quinazolin-4-ones enhanced by microwave-assisted decomposition of formamide
作者:Ioannis K. Kostakis、Abdelhakim Elomri、Elisabeth Seguin、Mauro Iannelli、Thierry Besson
DOI:10.1016/j.tetlet.2007.07.114
日期:2007.9
An efficient methodology for the preparation of a series of 2,3-disubstituted-quinazolin-4(3H) -ones is described via a three step reaction from anthranilic acid. The obtained results also reveal that microwave-assisted rapid decomposition of formamide under controlled conditions of power, temperature and time is a very convenient source of ammonia for the synthesis of 2-substituted-quinazolin-4(3H)-ones and other rings. (c) 2007 Elsevier Ltd. All rights reserved.
Rearrangement of 4-Imino-4<i>H</i>-3,1-benzoxazines to 4-Quinazolinones via Amidine Carboxamides