The Oxidative Mannich Reaction Catalyzed by Dirhodium Caprolactamate
摘要:
Dirhodium caprolactamate [Rh2(cap)4] is a highly effective catalyst for the oxidative Mannich reaction. The reaction proceeds via C-H oxidation of a tertiary amine followed by nucleophilic capture. This green transformation is conducted in protic solvent using inexpensive T-HYDRO (70% t-BuOOH in water). Synthetically valuable gamma-aminoalkyl butenolides are obtained.
Allylic Oxidations Catalyzed by Dirhodium Catalysts under Aqueous Conditions
申请人:Doyle Michael P.
公开号:US20090093638A1
公开(公告)日:2009-04-09
The present invention relates to compositions and methods for achieving the efficient allylic oxidation of organic molecules, especially olefins and steroids, under aqueous conditions. The invention concerns the use of dirhodium (II,II) “paddlewheel complexes, and in particular, dirhodium carboximate and tert-butyl hydroperoxide as catalysts for the reaction. The use of aqueous conditions is particularly advantageous in the allylic oxidation of 7-keto steroids, which could not be effectively oxidized using anhydrous methods, and in extending allylic oxidation to enamides and enol ethers.
The Oxidative Mannich Reaction Catalyzed by Dirhodium Caprolactamate
作者:Arthur J. Catino、Jason M. Nichols、Brian J. Nettles、Michael P. Doyle
DOI:10.1021/ja061146m
日期:2006.5.1
Dirhodium caprolactamate [Rh2(cap)4] is a highly effective catalyst for the oxidative Mannich reaction. The reaction proceeds via C-H oxidation of a tertiary amine followed by nucleophilic capture. This green transformation is conducted in protic solvent using inexpensive T-HYDRO (70% t-BuOOH in water). Synthetically valuable gamma-aminoalkyl butenolides are obtained.
US8163944B2
申请人:——
公开号:US8163944B2
公开(公告)日:2012-04-24
Highly efficient Cu-catalyzed oxidative coupling of tertiary amines and siloxyfurans
A mild, selective, and efficient protocol for the synthesis of gamma-aminoalkyl butenolides via the oxidative coupling between tertiary amines and siloxyfurans catalyzed by simple copper salts was developed. Compared with the reported method, our method employs copper catalyst instead of the expensive rhodium catalyst. Besides TBHP, both O-2 and H2O2 can also be utilized as oxidant to effect the coupling. (C) 2008 Elsevier Ltd. All rights reserved.