Article Dans Une Revue Green Chemistry Année : 2014

Environmentally benign glycosylation of aryl pyranosides and aryl/alkyl furanosides demonstrating the versatility of thermostable CGTase from Thermoanaerobacterium sp.

Résumé

An extensive study on the specificity of transglycosylation and disproportionation of Thermoanaerobacterium sp. cyclodextrin glucosyltranferases against aryl glucopyranosides or furanosides was achieved. While a mixture of maltoside and isomaltoside was obtained respectively using p-nitrophenyl glucopyranoside as acceptor, only one regioisomer, namely the p-nitrophenyl α-D-Glcp-(1,3)-α-L-Araf was isolated using p-nitrophenyl arabinofuranoside as acceptor. Interestingly, similar outcomes were found when using p-nitrophenyl galactofuranoside. Furthermore, activation by microwave irradiation resulted in faster reaction times and higher yields and led to glucosidic oligosaccharides with up to 70% conversion. The influence of the anomeric and C-4 configurations of the glycosidic acceptors on the transglycosylation, previously stated for the CGTase family, was not observed and unconventional substrate specificity towards alkyl furanosides was highlighted.

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hal-01075732 , version 1 (20-10-2014)

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Alizé Pennec, Laurent Legentil, Luis Herrera-Estrella, Vincent Ferrières, Anne-Laure Chauvin, et al.. Environmentally benign glycosylation of aryl pyranosides and aryl/alkyl furanosides demonstrating the versatility of thermostable CGTase from Thermoanaerobacterium sp.. Green Chemistry, 2014, 16, pp.3803. ⟨10.1039/C4GC00631C⟩. ⟨hal-01075732⟩
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