Substrate Evaluation of<i>Rhodococcus erythropolis</i>SET1, a Nitrile Hydrolysing Bacterium, Demonstrating Dual Activity Strongly Dependent on Nitrile Sub-Structure
作者:Tracey M. Coady、Lee V. Coffey、Catherine O'Reilly、Claire M. Lennon
DOI:10.1002/ejoc.201403201
日期:2015.2
Rhodococcus erythropolis SET1, a novel nitrilehydrolysing bacterial isolate, has been undertaken with 34 nitriles, 33 chiral and 1 prochiral. These substrates consist primarily of β-hydroxy nitriles with varying alkyl and aryl groups at the β position and containing in several compounds different substituents α to the nitrile. In the case of β-hydroxy nitriles without substitution at the α position
Process for the preparation of chiral azetidinones
申请人:Framroze Patel Bomi
公开号:US20070129540A1
公开(公告)日:2007-06-07
Processes for preparing compounds of formula I are disclosed comprising the steps of:
(a) forming of chiral propionic acid ester compounds of formula V.
(b) reacting compounds of formula V with aniline compounds to yield compounds of formula I
Unexpected Stereorecognition in Nitrilase-Catalyzed Hydrolysis of β-Hydroxy Nitriles
作者:Sukanta Kamila、Dunming Zhu、Edward R. Biehl、Ling Hua
DOI:10.1021/ol061542+
日期:2006.9.1
Biocatalytic enantioselective hydrolysis of beta-hydroxy nitriles to corresponding (S)-enriched beta-hydroxy carboxylic acids has been achieved for the first time by an isolated nitrilase bll6402 from Bradyrhizobium japonicum USDA110. This offers a new "green" approach to optically pure beta-hydroxy nitriles and beta-hydroxy carboxylic acids. The observed remote stereorecognition is surprising because
Asymmetric Synthesis of Both Antipodes of β-Hydroxy Nitriles and β-Hydroxy Carboxylic Acids via Enzymatic Reduction or Sequential Reduction/Hydrolysis
作者:Haribabu Ankati、Dunming Zhu、Yan Yang、Edward R. Biehl、Ling Hua
DOI:10.1021/jo802495f
日期:2009.2.20
afforded (R)- or (S)-β-hydroxy nitriles with excellent optical purity and yield. Subsequently, nitrilase-catalyzedhydrolysis of the obtained optically pure β-hydroxy nitriles led to the corresponding β-hydroxy carboxylic acids in high yields. More importantly, the sequential enzymatic reduction and hydrolysis could be carried out in “two-step-one-pot” fashion without the isolation of intermediates β-hydroxy