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• W2069486359 abstract "Partially purified Trichoderma reesei RUT-C30 acetyl esterase preparation was found to catalyze acyl transfer reactions in organic solvents, mixtures of organic solvents with water and even in water. Using different acyl donors, the best results for acetyl transfer in water were obtained using vinyl acetate. As acetyl acceptors, a variety of hydroxyl bearing compounds in aqueous solutions were used. Degree of conversion and the number of newly formed acetates varied according to the acceptor used. Conversions over 50% were observed for the majority of several common monosaccharides, their methyl and deoxy derivatives and oligosaccharides. In several cases, the transesterification reaction exhibited strict regioselectivity, leading to only one acetyl derivative. Preparative potential of the transesterification in water was demonstrated by acetylation of methyl β-d-glucopyranoside, 4-nitrophenyl β-d-glucopyranoside and kojic acid, yielding 56.4% of methyl 3-O-acetyl β-d-glucopyranoside, 70.2% of 4-nitrophenyl 3-O-acetyl β-d-glucopyranoside and 30.9% of 7-O-acetyl-kojic acid as the only reaction products. This enzymatically catalyzed transacetylation in water, which is applied to transformation of saccharides for the first time, opens a new area in chemoenzymatic synthesis. Its major advantages are simplicity, highly regioselective esterification of polar compounds, high yields, low enzyme consumption and elimination of the need to use toxic organic solvents." @default.
• W2069486359 created "2016-06-24" @default.
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• W2069486359 date "2004-09-01" @default.
• W2069486359 modified "2023-10-18" @default.
• W2069486359 title "Trichoderma reesei acetyl esterase catalyzes transesterification in water" @default.
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• W2069486359 doi "https://doi.org/10.1016/j.molcatb.2004.05.007" @default.
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