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Synthesis of propyl 4 o 3 6 di o methyl beta d glucopyranosyl 2 3 di o methyl alpha d rhamnopyranoside



Synthesis of propyl 4 o 3 6 di o methyl beta d glucopyranosyl 2 3 di o methyl alpha d rhamnopyranoside



Carbohydrate Research 141(1): 91-98



Partial hydrolysis of allyl 2,3:4,6-di-O-isopropylidene-.alpha.-D-mannopyranoside gave allyl 2,3-O-isopropylidene-.alpha.-D-mannopyranoside which was converted into allyl 2,3-O-isopropylidene-.alpha.-D-rhamnopyranoside by reduction of the 6-O-tosyl derivative with lithium aluminium hydride. Condensation of allyl 2,3-O-isopropylidene-.alpha.-D-rhamnopyranoside with 2,4-di-O-acetyl-3,6-di-O-methyl-.alpha.-D-glucopyranosyl chloride in the presence of mercury(II) cyanide gave the crystalline .beta.-linked disaccharide which was converted into the title compound.

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