Homogeneous cobalt-catalyzed deoxygenative hydrogenation of amides to amines
作者:Veronica Papa、Jose R. Cabrero-Antonino、Anke Spannenberg、Kathrin Junge、Matthias Beller
DOI:10.1039/d0cy01078b
日期:——
hydrogenation of amides to amines is presented. The optimal catalytic system based on a combination of [Co(NTf2)2] and (p-anisyl)triphos (L3) in the presence of [Me3SiOTf] as acidic co-catalyst facilitates the direct hydrogenation of a broad range of amides to the corresponding amines under mild conditions. A set of control experiments indicate that, after the initial reduction of the amide carboxylic
METHOD FOR PRODUCING ALCOHOL BY HYDROGENATING LACTONE AND CARBOXYLIC ACID ESTER IN LIQUID PHASE
申请人:Maeda Hirofumi
公开号:US20100113842A1
公开(公告)日:2010-05-06
Disclosed is a method for producing an alcohol from a lactone or a carboxylic acid ester, which enables to produce an alcohol from a lactone or a carboxylic acid ester under relatively mild conditions with high yield and high catalytic efficiency. This method also enables to produce an optically active alcohol from an optically active lactone or an optically active carboxylic acid ester. Specifically disclosed is a method for producing an alcohol by hydrogen reducing a lactone or a carboxylic acid ester in the presence of a catalyst containing ruthenium and a phosphine compound represented by the following general formula (1):
wherein R
1
represents a spacer; R
2
, R
3
, R
4
, R
5
, R
6
and R
7
independently represent a hydrogen atom, an alkyl group having 1-12 carbon atoms, an aryl group or a heterocyclic group; and R
8
, R
9
, R
10
, R
11
, R
12
and R
13
independently represent an alkyl group having 1-12 carbon atoms, an aryl group or a heterocyclic group.