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- W250378269 abstract "The reaction between methyl 2,3-di-O-benzyl-4,6-di-O-mesyl--D-glucopyranoside (1b) and potassium superoxide resulted in hydrolysis, and gave methyl 2,3-di-O-benzyl--D-glucopyranoside (1) as a sole product. When the reaction was performed with a vicinal dimesylate, methyl 4,6-O-benzylidene-2,3-di-O-mesyl--D-altropyranoside (4b), again the hydrolysis product, methyl 4,6-O-benzylidene--D-altropyranoside (4) was obtained. However, the reaction of potassium superoxide with another vicinal dimesylate, methyl 4,6-O-benzylidene-2,3-di-O-mesyl--D-glucopyranoside (3b), nucleophilic displacement took place to afford methyl 4,6-O-benzylidene--D-altropyranoside (4). Apparently different results from two trans vicinal dimesylates, 3b and 4b are explained by the transient formation of epoxides, methyl 2,3-anhydro-4,6-O-benzylidene--D-allopyranoside (8) and methyl 2,3-anhydro-4,6-O-benzylidene--D-mannopyranoside (9) by . The reaction between the allo epoxide 8 and gave altro 4. The manno epoxide 9 also afforded altro 4 as the major product. Facile epoxide formation by the reaction of a vicinal dimesylate and superoxide was also observed with 3-O-benzyl-1,2-O-isopropylidene-5,6-di-O-mesyl--D-glucofuranose: 5,6-anhydro-3-O-benzyl-1,2-O-isopropylidene--L-idofuranose was obtained." @default.
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- W250378269 date "1993-01-01" @default.
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- W250378269 title "The Reaction of Superoxide with Carbohydrate Sulphonates" @default.
- W250378269 hasPublicationYear "1993" @default.
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