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Kinetic Resolution of 2-Chloro-1-(3,4-dichlorophenyl)ethanol by Lipase-Catalyzed Transesterification

Kinetic Resolution of 2-Chloro-1-(3,4-dichlorophenyl)ethanol by Lipase-Catalyzed Transesterification

ISSN:1001-604X
2007年第25卷第11期
FULL PAPERS
王明慧李亚丰,刘永军张书圣 Ming-Hui WANG,Ya-Feng LI,Yong-Jun LIU,Shu-Sheng ZHANG

Kinetic resolution of racemic 2-chloro-1-(3,4-dichlorophenyl)ethanol was performed by free Alcaligene sp. lipase-catalyzed irreversible transesterification affording the (R)-isomer with ≥95% ee and the (S)-isomer with ≥90% ee. The activity of lipase Alcaligene sp. strongly depends on the basicity of the reaction system, and an organic base such as triethylamine can enhance the activity of the lipase and enantioselectivity markedly.

Kinetic resolution of racemic 2-chloro-1-(3,4-dichlorophenyl)ethanol was performed by free Alcaligene sp. lipase-catalyzed irreversible transesterification affording the (R)-isomer with ≧ 95% ee and the (S)-isomer with ≧ 90% ee. The activity of lipase Alcaligene sp. strongly depends on the basicity of the reaction system, and an organic base such as triethylamine can enhance the activity of the lipase and enantioselectivity markedly.

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ISSN:1001-604X
2007年第25卷第11期
FULL PAPERS

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