Sc(BINOL)2Li: a new heterobimetallic catalyst for the asymmetric Strecker reaction
摘要:
The new chiral heterobimetallic complex Sc(BINOL)(2)Li 1 was prepared and used as a catalyst in the enantioselective addition of a cyanide source (HCN or TMSCN) to several imines. High conversion rates and enantiomeric e excesses (e.e.s) as high as 95% were obtained. (C) 2001 Elsevier Science Ltd. All rights reserved.
Imidazole-2-carbamates and process for their production and pharmaceutical compositions containing them.
申请人:SYNTEX (U.S.A.) INC.
公开号:EP0000089A1
公开(公告)日:1978-12-20
Imidazole-2-carbamates represented by the formula
wherein R is hydrogen or alkyl of 1-4 carbons, R1 is alkyl of 1-6 carbons and the naphthyl group is attached to the imidazole ring at the 1 or2 positions ofthe naphthyl ring, and the pharmaceutically acceptable salts thereof.
These compounds are useful as centrally acting skeletal muscle relaxants.
The compounds are prepared by ring closure of a compound of the formula
Sc(BINOL)2Li: a new heterobimetallic catalyst for the asymmetric Strecker reaction
作者:Murielle Chavarot、Janice J Byrne、Pierre Y Chavant、Yannick Vallée
DOI:10.1016/s0957-4166(01)00144-6
日期:2001.5
The new chiral heterobimetallic complex Sc(BINOL)(2)Li 1 was prepared and used as a catalyst in the enantioselective addition of a cyanide source (HCN or TMSCN) to several imines. High conversion rates and enantiomeric e excesses (e.e.s) as high as 95% were obtained. (C) 2001 Elsevier Science Ltd. All rights reserved.
Controllable Regioselective Construction of Both Functional α-Methylene-β- and -γ-amino Acid Derivatives Through an Organocatalyzed Tandem Allylic Alkylation and Amination
A new controllable and regioselectiveallylicalkylation and amination reaction has been developed for the highly selective construction of compounds containing α-alkylidene-β-amino acid and α-methylene-γ-butyrolactam moieties. Furthermore, on the basis of this controllable strategy, multicomponent tandem reactions have also been accomplished. The subsequent transformations of the densely functionalized