The present invention relates to compounds of Formula (I):
1
wherein A
1
is methylene, ethylene or propylene group and A
2
is N or CR
5
, or stereoisomeric forms, stereoisomeric mixtures, or pharmaceutically acceptable salt forms thereof, which are useful as inhibitors of HCV NS3 protease, and to pharmaceutical compositions and diagnostic kits comprising the same, and methods of using the same for treating viral infection or as an assay standard or reagent.
Transition metal catalyzed asymmetric cross coupling reactions. New ligands and the effects of added salts. Crystal structures of [Ph2PCH2CH{(CH2)3SMe}NMe2]·PdCl2 and [Ph2PCH2CH{(CH2)2SMe}NMe2]·PdCl2
作者:Graham Cross、Bindert K. Vriesema、Gerd Boven、Richard M. Kellogg、F. van Bolhuis
DOI:10.1016/0022-328x(89)87299-7
日期:1989.7
the carboxylgroup followed by substitution of hydroxyl by the diphenylphosphino group. These ligands are effective in promoting the Ni0 or Pd0 catalyzed cross coupling of the Grignard reagent of 1-chloro-1-phenylethane with vinyl bromide. The enantiomeric excesses found for coupling product formed in the presence of these ligands exceed those expected on the grounds solely of a steric effect of the
[EN] PROCESS FOR PRODUCING SULFUR-CONTAINING AMINO ACID OR SALT THEREOF<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN ACIDE AMINÉ CONTENANT DU SOUFRE OU DE L'UN DE SES SELS
申请人:SUMITOMO CHEMICAL CO
公开号:WO2011118849A1
公开(公告)日:2011-09-29
According to the present invention, a new process for producing a sulfur-containing amino acid without using of hydrogen cyanide or sodium azide which requires careful handling as a raw material can be provided. The present invention relates to a process for producing a sulfur-containing amino acid represented by the following formula (1) or a salt thereof: wherein R1 is an alkyl group having 1 to 12 carbon atoms and optionally having substituents or a cycloalkyl group having 3 to 12 carbon atoms and optionally having substituents, and n is an integral number of from 1 to 4, comprising a step of reacting a sulfur-containing 2-ketocarboxylic acid represented by the formula (2) or a salt thereof: wherein R1 and n mean the same as defined above, with ammonia and hydrogen in the presence of a transition metal catalyst.
Peptide inhibitors of hepatitis C virus NS3 protein
申请人:——
公开号:US20020177725A1
公开(公告)日:2002-11-28
This invention relates to a novel class of peptides having the Formula (I):
1
Which are useful as serine protease inhibitors, and more particularly as Hepatitis C virus(HCV) NS3 protease inhibitors. This invention also relates to pharmaceutical compositions comprising these compounds and methods of using the same in the treatment of HCV infection.
Preparation of Methionine or Selenomethionine from Homoserine via a Lactone Intermediate
申请人:Lorbert Stephen J.
公开号:US20130006014A1
公开(公告)日:2013-01-03
Provided herein are processes for the production of methionine or selenomethionine from homoserine. In particular, the processes proceed via the production of lactone intermediates.