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.
Substrate Control in the Gold(I)-Catalyzed Cyclization of β<i>-</i>Propargylamino Acrylic Esters and Further Transformations of the Resultant Dihydropyridines
作者:Jiří Mikušek、Petr Matouš、Eliška Matoušová、Martin Janoušek、Jiří Kuneš、Milan Pour
DOI:10.1002/adsc.201600412
日期:2016.9.15
β‐propargylamino acrylic esters with a push‐pull olefinic bond afforded good to high yields of dihydropyridines upon treatment with 5% tris(2‐furyl)phosphine‐gold(I) chloride/silver(I) tetrafluoroborate [(TFP)AuCl/AgBF4] in anhydrous benzene. Carbamate and sulfonyl groups were employed for nitrogen protection. On a model enyne, the p‐methoxybenzenesulfonyl (MBS) group was found to be a better protective