Highly enantioselective hydrogenation of 2-oxo-4-arybutanoic acids to 2-hydroxy-4-arylbutanoic acids
摘要:
The Ru-catalyzed asymmetric hydrogenation of 2-oxo-4-arybutanoic acids to afford 2-hydroxy-4-arybutanoic acids was accomplished by employing SunPhos as chiral ligand and 1 M aq HBr as additive. The high enantioselectivities (88.4%-92.6% ee) and efficiency (TON=10,000, TOF=300 h(-1)) make this method efficient for the synthesis of an important intermediate, (R)-2-hydroxy-4-phenylbutanoic acid, for ACE inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] INHIBITORS OF METALLO-BETA-LACTAMASES<br/>[FR] INHIBITEURS DE MÉTALLO-BÊTA-LACTAMASES
申请人:UNIV OXFORD INNOVATION LTD
公开号:WO2017093727A1
公开(公告)日:2017-06-08
The present invention relates to certain compounds, in particular, indole derivatives that function as inhibitors of bacterial metallo-beta- lactamases. The present invention also relates to processes for the preparation of these compounds, to pharmaceutical compositions comprising them, and to their use in the treatment of a bacterial infection.
Stereochemical control in microbial reduction. Part 31: Reduction of alkyl 2-oxo-4-arylbutyrates by baker's yeast under selected reaction conditions
作者:Duc Hai Dao、Mutsuo Okamura、Takeshi Akasaka、Yasushi Kawai、Kouichi Hida、Atsuyoshi Ohno
DOI:10.1016/s0957-4166(98)00277-8
日期:1998.8
Treatment of baker'syeast with phenacyl chloride in an aqueous–organic solvent has been proven to be an effective method of inhibiting the enzymes that afford (S)-enantiomers of α-hydroxy esters in the reduction of α-keto esters. The procedure is effective for the whole-cell system to produce the (R)-product with high chemical yield and high enantiomeric excess.
There are disclosed processes for preparing carboxyalkyl dipeptide derivatives and related compounds which are useful as angiotension converting enzyme (ACE) inhibitors and as antihypertensives and pharmaceutical compositions containing these carboxyalkyl dipeptide compounds in combination with another antihypertensive and/or diuretic compound.