Chemical Modification of Lipase for Rational Enhancement of Enantioselectivity
作者:Tadashi Ema、Hiroki Inoue
DOI:10.1246/cl.150667
日期:2015.10.5
Chemical modifications of the I287C mutant of a Burkholderia cepacia lipase afforded various I287C-X conjugates, among which I287C-PAA bearing an N-phenylacetamide (PAA) moiety showed excellent enantioselectivity and catalytic activity for secondary alcohols. Site-directed chemical modifications are powerful tools to control enantioselective biocatalysis.
Dynamic Kinetic Resolution of a Wide Range of Secondary Alcohols: Cooperation of Dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and CAL-B
作者:Mari Päiviö、Denys Mavrynsky、Reko Leino、Liisa T. Kanerva
DOI:10.1002/ejoc.201001703
日期:2011.3
The substrate scope in the dynamickineticresolution of secondary alcohols was studied by using 31 structurally different alcohols and isopropenyl acetate in the presence of dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and Candida antarctica lipase B (Novozym435, CAL-B) in toluene. The enzyme and the rutheniumcomplex were shown to function in a highly compatible manner allowing the conversion
Immobilized Manihot esculenta preparation as a novel biocatalyst in the enantioselective acetylation of racemic alcohols
作者:Luciana L. Machado、Telma L.G. Lemos、Marcos Carlos de Mattos、Maria da Conceicão F. de Oliveira、Gonzalo de Gonzalo、Vicente Gotor-Fernández、Vicente Gotor
DOI:10.1016/j.tetasy.2008.05.018
日期:2008.6
The enzymatic preparation obtained from a discard of Manihot esculenta roots has been successfully immobilized on calcium alginate hydrogels. This preparation has been tested as a chiral biocatalyst in the enzymatic acylation of a set of racemic aromatic alcohols. Depending on the reaction conditions, excellent enantioselectivities can be achieved. Some parameters that can alter the biocatalytic properties of the enzyme, such as solvent, temperature, acyl donor and substrate structure have been studied exhaustively in order to establish a deeper knowledge of this novel biocatalyst. (C) 2008 Elsevier Ltd. All rights reserved.
CO2-expanded liquids as solvents to enhance activity of Pseudozyma antarctica lipase B towards ortho-substituted 1-phenylethanols
作者:Moeko Otsu、Yuichi Suzuki、Afifa Ayu Koesoema、Hai Nam Hoang、Mayumi Tamura、Tomoko Matsuda
DOI:10.1016/j.tetlet.2020.152424
日期:2020.10
Pseudozyma (Candida) antarctica lipase B (CAL-B, Novozym 435 (R)) is one of the most widely used and outstanding biocatalysts. However, CAL-B-catalyzed transesterification of ortho-substituted 1-phenylethanol analogs suffers low conversion. In this research, the reactions were accelerated by using CO2-expanded liquids, liquids expanded by dissolving pressurized CO2, such as CO2-expanded hexane or CO2-expanded MeTHF. (C) 2020 Elsevier Ltd. All rights reserved.