A new type of di-site chiralphase transfer catalyst has been designed and synthesized from cinchona alkaloids as a chiral precursor. The prepared catalysts are applied in the asymmetric Henry reaction to a wide range of aldehydes using mild concentrations of a base and solvent and under room-temperature conditions. Under the optimized reaction conditions, the highest chemical yields up to 99% along
[EN] LINCOSAMIDE ANTIBIOTICS AND USES THEREOF<br/>[FR] ANTIBIOTIQUES LINCONSAMIDES ET LEURS UTILISATIONS
申请人:HARVARD COLLEGE
公开号:WO2019032936A8
公开(公告)日:2019-04-04
Lipase catalysed resolution of nitro aldol adducts
作者:Menno J Sorgedrager、Rita Malpique、Fred van Rantwijk、Roger A Sheldon
DOI:10.1016/j.tetasy.2004.02.025
日期:2004.4
The kinetic resolution of a range or 1-nitro-2-alkanols by lipase-catalysed esterification using various lipases and succinic anhydride as an acyl donor has been studied. E values of up to 100 were obtained with Novozym 435 in the resolution of 1-nitro-2-pentanol with succinic anhydride in TBME. Acylation with succinic anhydride proved much more enantioselective than with vinyl acetate. (C) 2004 Elsevier Ltd. All rights reserved.
Nakamura, Kaoru; Inoue, Yoshihiko; Kitayama, Takashi, Agricultural and Biological Chemistry, 1990, vol. 54, # 6, p. 1569 - 1570