Lipase activity and enantioselectivity of whole cells from a wild-type Aspergillius flavus strain
2014
Solarte Orozco, Carmen Eugenia | Yara Varón, Edinson | Eras i Joli, Jordi | Torres i Grifo, Mercè | Balcells Fluvià, Mercè | Canela i Garayoa, Ramon
This study reports the high enantiomeric preference of whole cell lipase from Aspergillus flavus wild-type that allows the preparation of a chiral secondary alcohol. Whole cells prepared from a wild-type Aspergillus flavus strain were used as biocatalysts to prepare (R)-1-phenylethyl acetate. (R)-1-Phenylethanol was esterified into (R)-1-phenylethyl acetate with a 94.6% enantiomeric excess (ee) within 24 h at 40 °C and (S)-1-phenylethanol remained in the reaction medium with a >99%ee. Besides, this biocatalyst allows the preparation of ethyl laurate and a mixture of 2-chloro-1-(chloromethyl)ethyl acrylate and 2,3-dichloro-1-propyl acrylate. The ethyl laurate yield was 96%, whereas the synthesis of a mixture of the acrylate regioisomers, 2-chloro-1-(chloromethyl)ethyl acrylate and 2,3-dichloro-1-propyl acrylate gave similar yields to those obtained using commercial lipases.
显示更多 [+] 显示较少 [-]This work was supported in part by a Grant-in-Aid for the Secretaría de Estado de Política Científica y Tecnológica of the Spanish Ministry of Education and Culture (contract grant number: CTQ2009-14699-C02-01). The authors are grateful to the Comissionat per a Universitats i Recerca del Departament d’Innovació, Universitats i Empresa de la Generalitat de Catalunya and to the European social Fund (EFS) for the FI grant of Carmen Solarte Orozco and to the Vicerrectorat de Recerca de l’Universitat de Lleida for the UdL grant of Edinson Yara Varón. We also thank Tania Yates for the proofreading of the manuscript.
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