Rhizopus arrhizus-mediated asymmetric reduction of arylalkanones: unusual anti-Prelong products with benzyl alkyl ketones
摘要:
Rhizopus arrhizus-mediated microbial reduction of various aryl alkyl ketones afforded chiral carbinols in good yields and high enantiomeric purity. The most striking feature was the formation of the anti-Prelog (R)-alcohols with the benzyl alkyl ketones, while the other ketones ArXCOR (X = (CH2)(n), n = 0 or 2, OCH2 or SCH2 and R = Me/Et/n-Bu) furnished (S)-alcohols. (C) 2011 Elsevier Ltd. All rights reserved.
Methodology Development in Directed Evolution: Exploring Options when Applying Triple-Code Saturation Mutagenesis
作者:Ge Qu、Richard Lonsdale、Peiyuan Yao、Guangyue Li、Beibei Liu、Manfred T. Reetz、Zhoutong Sun
DOI:10.1002/cbic.201700562
日期:2018.2.2
Directedevolution: Two strategies regarding the application of triple‐code saturationmutagenesis (TCSM) at multiresidue sites of the T. brockii alcohol dehydrogenase (TbSADH) by using distinct reduced amino‐acid alphabets are compared. By using prochiral tetrahydrofuran‐3‐one, highly R‐ and S‐selective variants are obtained with minimal screening. The origin of stereoselectivity is provided by molecular
Preparation and Resolution of a Modular Class of Axially Chiral Quinazoline-Containing Ligands and Their Application in Asymmetric Rhodium-Catalyzed Olefin Hydroboration
作者:David J. Connolly、Patrick M. Lacey、Mary McCarthy、Cormac P. Saunders、Anne-Marie Carroll、Richard Goddard、Patrick J. Guiry
DOI:10.1021/jo049195+
日期:2004.10.1
Displacement of the resolving agent by reaction with 1,2-bis(diphenylphosphino)ethane afforded enantiopure ligand in each case. Their rhodium complexes were prepared and applied in the enantioselective hydroboration of a range of vinylarenes. The quinazolinap catalysts were found to be extremely active, giving excellent conversions, good to complete regioselectivities, and the highest enantioselectivities obtained
The ene-reductases mediated bioreduction of a selection of open-chain α-alkyl-β-aryl enones afforded the corresponding saturated α-chiral ketones in high yield and optical purity in several cases. The stereo-electronic requirements of the reaction have been investigated, considering the nature and location of substituents on the aromatic ring as well as the steric hindrance at the α-position and adjacent
[EN] PYRIDINE CARBOXYLIC ACID DERIVATIVES AS GLUCOKINASE MODULATORS<br/>[FR] DERIVES D'ACIDES CARBOXYLIQUE DE PYRIDINE EN TANT QUE MODULATEURS DE LA GLUCOKINASE
申请人:ASTRAZENECA AB
公开号:WO2005044801A1
公开(公告)日:2005-05-19
A compound of Formula (I): wherein: A is phenyl or a 5- or 6-membered heteroaryl ring, optionally substituted; R1 and R2 are selected from hydrogen and methyl; with the proviso that at least one of R1 and R2 is methyl; or a salt, pro-drug or solvate thereof, are described. Their use as GLK activators, pharmaceutical compositions containing them, and processes for their preparation are also described.
Enantioselective Reduction of Ketones and Synthesis of 2-Methyl-2,3-dihydro-1-benzofuran Catalyzed by Chiral Spiroborate Ester
作者:H. S. Patil、M. D. Nikalje、A. U. Chopade、M. U. Chopade
DOI:10.1134/s1070428021040163
日期:2021.4
achieved through the use of chiral spiroborate ester catalyst. The catalyst is applicable for both analytical and industrial purposes since it is not sensitive to air and moisture. A rapid synthetic route has been developed for the preparation of (S)-2-methyl-2,3-dihydro-1-benzofuran via enantioselective reduction of homobenzylic ketone in the presence of a chiral spiroborate catalyst as the key step.