Process for the single-stage preparation of glycosyl fluorides

Details Process for the single-stage preparation of glycosyl fluorides Process for the single-stage preparation of glycosyl fluorides

C - Chemistry, Metallurgy

07

H

260/233.4

C07H 5/02 (2006.01) C07H 13/04 (2006.01)

Patent

CA 1271745

ABSTRACT OF THE INVENTION A process for the single-stage preparation of glycosyl fluorides by dissolving saccharides in liquid hydrogen fluoride and evaporating the hydrogen fluoride, wherein the resulting glycosyl fluoride is isolated in such a way that, when the evaporation of the hydrogen fluoride is started at a relatively high temperature, in general at -20 to +20°C, the evaporation is effected at a high evaporation rate or, when a low evaporation rate is used at the start of the evaporation, a sufficiently low temperature is set, in general -80°C to -30°C. The products of the process are useful as intermediates for a large number of syntheses, such as for glycoside syntheses, due to their relative stability and particular reactivity as compared with other glycosyl halides.

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