Synthesis of 2,5-Bis(hetero)aryl 4′-Substituted 4,5′-Bisoxazoles via Copper(I)-Catalyzed Domino Reactions of Activated Methylene Isocyanides with 2-Phenyl- and 2-(2-Thienyl)-4-[(aryl/heteroaryl)(methylthio)methylene]oxazol-5(4<i>H</i>)-ones
作者:Somaraju Yugandar、Anand Acharya、Hiriyakkanavar Ila
DOI:10.1021/jo400317g
日期:2013.4.19
An efficient straightforward synthesis of 2,5,4′-trisubstituted 4,5′-bisoxazoles via copper(I)-catalyzed domino reactions of 2-phenyl- and 2-(2-thienyl)-4-[(aryl/heteroaryl)methylene]-5-oxazolones with activatedmethylene isocyanides has been reported. The overall domino process comprised of formation of one C–C and two C–O bonds involves initial nucleophilic ring opening of oxazolones by cupriomethylene