Asymmetric dihydroxylation of disubstituted allenes
摘要:
Asymmetric dihydroxylation of 1,1-disubstituted and 1,3-disubstituted allenes can be used to synthesize chiral alpha-hydroxy ketones. We have also obtained alpha,alpha'-dihydroxy ketones with high enantioselectivity from 1,3-disubstituted allenes. Low conversion of the dihydroxylation of chiral allenes can be used as a kinetic resolution of sterically hindered allenes. (c) 2005 Elsevier Ltd. All rights reserved.
The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.
[EN] HEPATITIS C VIRUS INHIBITORS<br/>[FR] INHIBITEURS DU VIRUS DE L'HÉPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2011082077A1
公开(公告)日:2011-07-07
The present disclosure is generally directed to antiviral compounds, and more specifically directed to compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such compounds, and methods for inhibiting the function of the NS5A protein.
N-tosyl-phenylglycinol 4, afford with two sequential Grignard additions predominantly the tertiary alcohols 8. Electrochemical detosylation, followed by aqueous work up, yields enantiomerically enriched ketones 10.
Two amino pentoses, 2-acetamido-2-deoxy-d-arabinose and -d-ribose, are conveniently synthesized from 2-amino-2-deoxy-d-pentonic acid derivatives, obtained by the stereoselective reaction of the chiral imine 1 with 2,3-O-isopropylidene-d-glyceraldehyde.