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The transglucosidations of methyl 4-O-methyl-α- and -β-d-glucopyranoside in ethanolic camphor-10-sulfonic acid, and of ethyl 4-O-methyl-α- and -β-d-glucopyranoside in methanolic camphor-10-sulfonic acid, have been studied. Samples were removed at intervals and the proportions of the glucosides determined by GC of their acetates. The results show that the anomer with the inverted configuration predominates...
The acid catalyzed ethanolysis of methyl 5-O-methyl-α- and -β-d-glucofuranoside and the analogous methanolysis of ethyl 5-O-methyl-α- and -β-d-glucofuranoside have been investigated. For all four reactions, the primarily formed transglycosylation product was a single glycoside that had the opposite anomeric configuration to the starting material. This strongly indicates that a d-glucose methyl ethyl...
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