SYNTHESIS OF 1',6'-DISUBSTITUTED SUCROSES AND THEIR BEHAVIOR AS GLUCOSYL DONORS FOR A MICROBIAL ALPHA-GLUCOSYLTRANSFERASE

摘要

Versatile 6'-chloro-6'-deoxy-1'-substituted sucrose derivatives were synthesized in search of an optimum donor substrate for the intermolecular transglucosylation with the alpha-glucosyltransferase from Protaminobacter rubrum. Two substituents at the C-1' and C-6' positions of sucrose were introduced utilizing the distinct reactivity of the corresponding sulfonates. Methyl beta-D-arabinofuranoside was most efficiently glucosylated with the 1'-deoxy derivative 5. Hydroxyl and fluoro groups at C-1' show a tendency to enhance the intramolecular transglucosylations, giving 3-O-(alpha-D-glucopyranosyl)-D-fructose derivatives. [References: 26]