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Regio- and stereoselective anomeric esterification of glucopyranose 1,2-diols and a facile preparation of 2-O-acetylated glucopyranosyl trichloroacetimidates from the corresponding 1,2-diols
- Source :
-
Carbohydrate Research . May2007, Vol. 342 Issue 6, p797-805. 9p. - Publication Year :
- 2007
-
Abstract
- Abstract: A highly regio- and stereoselective anomeric esterification of 3-O-allyl (or benzyl, or benzoyl)-4,6-O-isopropylidene-α,β-d-glucopyranose with acetyl chloride, or allyl chloroformate, or ethyl chloroformate gave the corresponding 2-OH, 1-β-acetates or -carbonates in excellent yields. The 2-OH, 1-β-acetates were readily converted to the corresponding 2-O-acetylated glucopyranosyl trichloroacetimidates by reaction with trichloroacetonitrile via base promoted acetyl migration, while the 2-OH, 1-β-carbonates were good glycosyl acceptors for the synthesis of (1→2)-linked oligosaccharides. [Copyright &y& Elsevier]
- Subjects :
- *ESTERIFICATION
*ACETATES
*OLIGOSACCHARIDES
*ACETYLATION
Subjects
Details
- Language :
- English
- ISSN :
- 00086215
- Volume :
- 342
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Carbohydrate Research
- Publication Type :
- Academic Journal
- Accession number :
- 24218746
- Full Text :
- https://doi.org/10.1016/j.carres.2007.01.010