Synthesis of Pyrroles by Gold(I)-Catalyzed Amino−Claisen Rearrangement of <i>N</i>-Propargyl Enaminone Derivatives
作者:Akio Saito、Tomoyo Konishi、Yuji Hanzawa
DOI:10.1021/ol902716n
日期:2010.1.15
The cationic N-heterocyclic carbene−gold(I) complex catalyzes the formation of tri- and tetrasubstituted pyrroles via the amino−Claisenrearrangement of N-propargyl β-enaminone derivatives and the cyclization of α-allenyl β-enaminone intermediates.
Tridentate P,N,N-ligand promoted copper-catalyzed [3 + 2] cycloaddition of propargylic esters with β-enamino esters: synthesis of highly functionalized pyrroles
作者:Qing Li、Chuan-Jin Hou、Yun-Ze Hui、Yan-Jun Liu、Rui-Feng Yang、Xiang-Ping Hu
DOI:10.1039/c5ra19304d
日期:——
A copper-catalyzed [3 + 2] cycloaddition of propargylicesters with β-enamino esters under mild reaction conditions for the construction of highlyfunctionalized pyrroles has been developed. By employment of a newly developed tridentate P,N,N-ligand, a variety of fully substituted pyrroles were achieved in good to high yields.