Rhodium-Catalyzed Synthesis of Unsymmetric Di(heteroaryl)ureas Involving an Equilibrium Shift
作者:Mieko Arisawa、Taro Mizuno、Kanako Nozawa-Kumada、Kaori Itto-Nakama、Miyu Furuta、Saori Tanii
DOI:10.1021/acs.orglett.1c03485
日期:2021.12.17
Unsymmetric di(heteroaryl)ureas such as HetAr1-NHCONH-HetAr2 are efficiently synthesized from two symmetric ureas, HetAr1-NHCONH-HetAr1 and HetAr2-NHCONH-HetAr2, by rhodium-catalyzed exchange reactions. The equilibrium in some of the reactions can be shifted to the formation of unsymmetric ureas by the aggregation of the dimers formed by inter- and intramolecular hydrogen bonding.
不对称二(杂芳基)脲如HetAr 1 -NHCONH-HetAr 2由两种对称脲HetAr 1 -NHCONH-HetAr 1和HetAr 2 -NHCONH-HetAr 2通过铑催化交换反应有效合成。一些反应中的平衡可以通过分子间和分子内氢键形成的二聚体的聚集转移到不对称脲的形成。