Influencing the regioselectivity of lipase-catalyzed hydrolysis with [bmim]PF6
摘要:
An easy preparation of mono-deprotected thioglucopyramosides via a selective Candica cylindracea lipase-catalyzed hydrolysis of a commercially available peracetylated precursor is described. Especially, ethyl 2,3,4-tri-O-acetyl-1-thio-beta-D-glucopyranoside and ethyl 2,3,6-tri-O-acetyl-1-thio-beta-D-glucopyranoside were obtained in 100% and 54% isolated yields, respectively. The influence of the ratio of [bmim]PF6/buffer towards the regioselectivity of the deacetylation step and the acyl migration is discussed. (c) 2009 Elsevier Ltd. All rights reserved.