Diaminophosphine Oxide Ligand Enabled Asymmetric Nickel-Catalyzed Hydrocarbamoylations of Alkenes
作者:Pavel A. Donets、Nicolai Cramer
DOI:10.1021/ja406730t
日期:2013.8.14
Chiral trivalent phosphorus species are the dominant class of ligands and the key controlling element in asymmetric homogeneous transition-metalcatalysis. Here, novel chiral diaminophosphine oxide ligands are described. The arising catalyst system with nickel(0) and trimethylaluminum efficiently activates formamide C-H bonds under mild conditions providing pyrrolidones via intramolecular hydrocarbamoylation
Ligand-Controlled Highly Regioselective and Asymmetric Hydrogenation of Quinoxalines Catalyzed by Ruthenium N-Heterocyclic Carbene Complexes
作者:Slawomir Urban、Nuria Ortega、Frank Glorius
DOI:10.1002/anie.201100008
日期:2011.4.11
Inflating flat bicycles: Proper choice of the N‐heterocyclic carbene (NHC) ligand in Ru NHC complexes allows the completely regioselective ligand‐controlled hydrogenation of either the heterocyclic or the carbocyclic ring of a substituted quinoxaline in quantitative yields. Chiral NHC ligands allow the challenging asymmetric hydrogenation of the carbocyclic ring of quinoxalines, yielding enantioenriched
METHOD OF ASYMMETRICALLY REDUCING 4- 5-(IMIDAZOL-1-YL)-2-MET HYLBENZOYL -3,5-DIMETHYL-BENZOIC ACID OR ESTER THEREOF
申请人:Mitsubishi Pharma Corporation
公开号:EP1719764A1
公开(公告)日:2006-11-08
The invention relates to a method of producing an optically active 4-[hydroxy[5-(imidazol-1-yl)-2-methylphenyl]methyl]-3,5-dimethylbenzoic acid or an ester thereof, which includes reacting 4-[5-(imidazol-1-yl)-2-methylbenzoyl]-3,5-dimethylbenzoic acid or an ester thereof with a silane agent in the presence of a particular zinc compound and an optically active diamine compound.
Method of asymmetrically reducing 4-[5-(imidazol-1-yl)-2-methylbenzoyl]-3,5- dimethylbenzoic acid or ester thereof
申请人:Ushio Hiroyuki
公开号:US20070161803A1
公开(公告)日:2007-07-12
The invention relates to a method of producing an optically active 4-[hydroxy[5-(imidazol-1-yl)-2-methylphenyl]methyl]-3,5-dimethylbenzoic acid or an ester thereof, which includes reacting 4-[5-(imidazol-1-yl)-2-methylbenzoyl]-3,5-dimethylbenzoic acid or an ester thereof with a silane agent in the presence of a particular zinc compound and an optically active diamine compound.