Showing papers on "Koenigs–Knorr reaction published in 2000"
TL;DR: Several types of C-glycosyl compounds, such as aryl, allyl and alkyl C- Glycosyl derivatives, were also obtained by the glycosylation using gly cosyl fluorides and the corresponding nucleophile with or without a Lewis acid.
138 citations
TL;DR: With the combined use of glycosyl trichloroacetimidates and thioglycosides, a group of natural diosgenyl saponins are efficiently synthesized, in either a stepwise or a ‘one-pot’ manner.
Abstract: With the combined use of glycosyl trichloroacetimidates and thioglycosides, a group of natural diosgenyl saponins (1–6) are efficiently synthesized, in either a stepwise or a ‘one-pot’ manner. The trichloroacetimidate is employed as an efficient temporary hydroxy protecting group in glycosylation with the glycosyl trichloroacetimidate. The intermolecular alkylthio-group transfer is demonstrated to be a common side-reaction during glycosylation with thioglycosides.
56 citations
TL;DR: In this article, phase transfer catalysis (PTC) was used for the synthesis of anomeric glycosyl derivatives, which included O-, S-, Se- and C- glycosides.
Abstract: Phase transfer catalysis (PTC) has been used for the synthesis of anomeric glycosyl derivatives, which included O-, S-, Se- and C- glycosides. These various glycosyl derivatives have been stereospecifically obtained from glycosyl halides 1, 2, 3, 14, 26. These reactions proceeded in generally good yields, and were essentially complete within 3 h.
28 citations