An iridiumcatalyst enables the reductive amination of carbonylgroups with unprecedented substrate scope, selectivity, and activity using formic acid as the hydrogen source (see scheme). The catalyst system provides significant improvement over commonly used boron hydrides.
The present invention relates to an iridium-based catalyst compound for hydrogenating reducible moieties, especially imines and iminiums, the catalyst compounds being defined by the formula: (Formula (I)) where ring B is a conjugated ring system with one or more substituents. The catalysts of the invention are particularly effective in reductive amination procedures which involve the in situ generation of the imine or iminium under reductive hydrogenative conditions.
作者:R. Ian Storer、Diane E. Carrera、Yike Ni、David W. C. MacMillan
DOI:10.1021/ja057222n
日期:2006.1.1
The first enantioselectiveorganocatalyticreductive amination reaction has been accomplished. The development of a new chiral phosphoric acid catalyst has provided a convenient strategy for the enantioselective construction of protected primary amines and provided a highly stereoselective method for the reductive amination of heterocyclic amines. A diverse spectrum of ketone and amine substrates can
Enantioselective organocatalytic reductive amination of aliphatic ketones by benzothiazoline as hydrogen donor
作者:Kodai Saito、Takahiko Akiyama
DOI:10.1039/c2cc31486j
日期:——
The chiral phosphoric acid-catalyzed enantioselectivereductiveamination of aliphatic ketones with aromatic amines was successfully achieved by the use of benzothiazoline as the hydrogen donor. Corresponding chiral aliphatic amines were obtained with excellent enantioselectivities.
Synthesis ofN-Aryl-2-allylpyrrolidinesvia Palladium-Catalyzed Carboamination Reactions of γ-(N-Arylamino)alkenes with Vinyl Bromides
作者:Joshua E. Ney、Michael B. Hay、Qifei Yang、John P. Wolfe
DOI:10.1002/adsc.200505172
日期:2005.10
A palladium-catalyzed carboamination reaction of gamma-N-arylamino alkenes with vinyl bromides that affords N-aryl-2-allyl pyrrolidines is described. These reactions proceed with high diastereoselectivity for the formation of trans-2,3- and cis-2,5-disubstituted pyrrolidines. Conditions for a tandem N-arylation/carboamination sequence that leads to the formation of an N-aryl-2-allyl pyrrolidine or