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
A Practical, Component-Based Synthetic Route to Methylthiolincosamine Permitting Facile Northern-Half Diversification of Lincosamide Antibiotics
作者:Matthew J. Mitcheltree、Jack W. Stevenson、Amarnath Pisipati、Andrew G. Myers
DOI:10.1021/jacs.1c03536
日期:2021.5.12
The development of a flexible, component-based synthetic route to the amino sugar fragment of the lincosamide antibiotics is described. This route hinges on the application and extension of nitroaldol chemistry to forge strategic bonds within complex amino sugar targets and employs a glycal epoxide as a versatile glycosyl donor for the installation of anomeric groups. Through building-block exchange