Sugar acetals, their preparation and use

Details Sugar acetals, their preparation and use Sugar acetals, their preparation and use

C - Chemistry, Metallurgy

07

H

260/233.2

C07H 15/04 (2006.01) C07H 5/02 (2006.01) C07H 9/04 (2006.01) C07H 13/00 (2006.01) C07H 13/06 (2006.01)

Patent

CA 1134355

ABSTRACT OF THE DISCLOSURE "Sugar Acetals, their Preparation and Use" Novel sugar acetals such as those of formula Image (I) where Ra is hydrocarbyl; Rb and Rc are hydrogen or hydrocarbyl; R3', R4' and R6' are hydrogen or R4' and R3' or R6' is Image are made from 1,4-linked reducing disaccharides by a new ex- change acetalation process in which the solvent is omitted. The sugar acetals have free hydroxy groups on the ring which groups can be converted to other substituents, e.g. chloro- deoxy or fatty acid acyl. After deprotection the correspond- ing derivative of the initial disaccharide is obtained. The acetals are useful intermediates in the synthesis of sugars.

349082

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