Chiral amides obtained from (±)-2-chloropropionate esters and a wide range of amines when the reaction is catalysed by lipase. The enantioselection of the enzyme in this aminolysis reaction depends on the substrate and nucleophile structure and reaction conditions. This lipase can catalyze a transamidation reaction if N-trifluoroethyl-2-chloropropionamide is used as substrate. In this way, amides are
Enantioselective Aminolysis of an α-Chloroester Catalyzed by <i>Candida cylindracea</i> Lipase Encapsulated in Sol−Gel Silica Glass
作者:Jovica D. Badjić、Ekaterina N. Kadnikova、Nenad M. Kostić
DOI:10.1021/ol015989o
日期:2001.6.1
see text] Lipase from Candida cylindracea (CcL) encapsulated in porous silica glass by a sol-gel method catalyzes enantioselective aminolysis of ethyl 2-chloropropionate. A silica matrix enhances the enzyme activity, i.e., improves the yield. The scope and limitations of the aminolysis reaction were investigated, and dynamickineticresolution of the ester was achieved. Encapsulated lipase remains active
Lipase catalysed synthesis of optically enriched α-haloamides
作者:A Azim
DOI:10.1016/s0968-0896(01)00006-2
日期:2001.5
An efficient lipase catalysed synthesis of optically enriched alpha -halogenated amides with concomitant optical enrichment of the starting alpha -haloesters is described. Candida antarctica lipase (CAL) was found to be a better catalyst over porcine pancreatic lipase (PPL) and Candida cylindracea lipase (CCL). The effect of different organic solvents was also studied. (C) 2001 Elsevier Science Ltd. All rights reserved.