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.
本发明揭示了具有代谢型谷氨酸受体配体活性的公式为1-芳烃磺酰基-2-芳基吡咯烷和吡啶衍生物。
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
DOI:10.1021/jo00371a041
日期:1986.10
Brønsted Acid-Catalyzed Intramolecular Hydroamination of Protected Alkenylamines. Synthesis of Pyrrolidines and Piperidines
作者:Björn Schlummer、John F. Hartwig
DOI:10.1021/ol025659j
日期:2002.5.1
[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.