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- W2378556780 abstract "The immobilized Alcaligenes sp.lipase-catalyzed enantioselective transesterification of α-cyano-3-phenoxybenzyl acetate in organic media was studied.The effects of solvent and acyl acceptors on the stability of the product,and the catalytic activity and enantioselectivity of the lipase were investigated.The experimental results indicated that lipase showed high activity in hydrophilic solvents such as Hexane,but had low enantioselectivity,and the decomposition of cyanohydrin was remarkable in those kinds of solvents.When the reaction performed in THF,the highest enantioselectivity was obtained,but the decomposition of cyanohydrin was observed yet,and the enantiomeric excess of product decreased with the reaction time prolonged;No marked effects of different acyl acceptors on the reaction was observed,methanol was the best choice,too many alcohol will reduce the reaction rate;when the content of water in THF 2%,disadvantage influence on the enzyme activity and the product stability appeared.Under optimal condition the reaction would give a 48% yield ofS-α-cyano-3-phenoxybenzyl alcohol with 99e.e.%." @default.
- W2378556780 created "2016-06-24" @default.
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- W2378556780 date "2005-01-01" @default.
- W2378556780 modified "2023-09-25" @default.
- W2378556780 title "Effects of Solvents and Acyl acceptors on the Lipase-Catalyzed Enantioselective Transesterification of α-Cyano-3-Phenoxybenzyl Acetate" @default.
- W2378556780 hasPublicationYear "2005" @default.
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