Exploring the Synthetic Applicability of a Cyanobacterium Nitrilase as Catalyst for Nitrile Hydrolysis
作者:Chandrani Mukherjee、Dunming Zhu、Edward R. Biehl、Ling Hua
DOI:10.1002/ejoc.200600699
日期:2006.12
specificity and syntheticapplicability of the nitrilase from cyanobacterium Synechocystis sp. strain PCC 6803 have been examined. This nitrilase catalyzed the hydrolysis of both aromatic and aliphatic nitriles to the corresponding acids in high yields. Furthermore, the stereoselective hydrolysis of phenyl-substituted β-hydroxy nitriles to (S)-enriched β-hydroxy carboxylic acids and selective hydrolysis of α
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
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
New chiral acetate imide enolate for stereoselective aldol reactions
作者:Claudio Palomo、Mikel Oiarbide、Alberto González、Jesús M. García、Fabienne Berrée、Anthony Linden
DOI:10.1016/0040-4039(96)01520-1
日期:1996.9
The chiral imide acetate 4 reacts upon lithium and titanium enolate formation conditions with aldehydes in a stereoselective manner. Remarkably, aldols obtained from aromatic and α,β-unsaturated aldehydes exhibited opposite stereochemistry than those obtained from aliphatic aldehydes.
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