Brønsted Acid-Catalyzed Intramolecular Hydroamination of Protected Alkenylamines. Synthesis of Pyrrolidines and Piperidines
摘要:
[GRAPHIC]The cyclization of aminoalkenes bearing an electron-withdrawing group on the nitrogen atom was catalyzed by triflic or sulfuric acid in toluene. Pyrrolidines and piperidines were formed in excellent yields. N-Phenylanilides also underwent cyclization to form gamma-lactams.
Gold- and Silver-Catalyzed Tandem Amination/Ring Expansion of Cyclopropyl Methanols with Sulfonamides as an Expedient Route to Pyrrolidines
作者:Weidong Rao、Philip Wai Hong Chan
DOI:10.1002/chem.200801242
日期:2008.11.17
An efficient syntheticroute to pyrrolidines that relies on AuCl/AgOTf-catalyzed tandem amination/ringexpansion of substituted cyclopropyl methanols with sulfonamides is reported herein. The reactions proceed rapidly at 100 degrees C with catalyst loadings as low as 2 mol % and produce the pyrrolidine products in yields of 30-95 %. The method was shown to be applicable to a broad range of cyclopropyl
1-arenesulfonyl-2-aryl-pyrrolidine and pyridine derivatives
申请人:Hoffmann- La Roche Inc.
公开号:US06284785B1
公开(公告)日:2001-09-04
1-Arenesulfonyl-2-Aryl-pyrrolidine and pyridine derivatives having activity as ligands of metabotropic glutamate receptors of the formula
are disclosed.
Palladium-catalyzed inter- and intramolecular hydroamination of styrenes coupled with alcohol oxidation using N-fluorobenzenesulfonimide as the oxidant
作者:Tao Xu、Shuifa Qiu、Guosheng Liu
DOI:10.1016/j.jorganchem.2010.07.015
日期:2011.1
Palladium-catalyzed inter- and intramolecular hydroaminations of styrenes that are coupled to alcohol oxidation under oxidative condition are reported. The fluorination reagent NFSI is used as the nitrogen source as well as the oxidant. Bidental nitrogen ligand bathocuproine plays a crucial role in this transformation. (C) 2010 Elsevier B.V. All rights reserved.
Gold(I)-Catalyzed Domino Ring-Opening Ring-Closing Hydroamination of Methylenecyclopropanes (MCPs) with Sulfonamides: Facile Preparation of Pyrrolidine Derivatives
作者:Min Shi、Le-Ping Liu、Jie Tang
DOI:10.1021/ol0614830
日期:2006.8.1
Reaction of methylenecyclopropanes 1 with sulfonamides produces the corresponding pyrrolidine derivatives 3 in moderate to good yields under the catalysis of Au(I) via a domino ring-opening ring-closing hydroamination process.
Synthesis of five- and six-membered nitrogen heterocycles via palladium(II)-catalyzed cyclization of unsaturated amides
作者:Yoshinao Tamaru、Makoto Hojo、Shinichi Kawamura、Zenichi Yoshida