Glycosides and Derivatives Thereof

Glycosides and Derivatives Thereof.- Phenyl a-D-glucopyranoslde, phenyl 3-D-glucopyranoside dlhydrate,2-nltrophenyl 3-D-gluco-pyranoslde,4-nltrophenyl a-D-glucopyranoside3,4-dinltrophenyl... [Pg.221]

M. Adinolfi, A. Iadonisi, A. Pezzella, and A. Ravida, Regioselective phenol or carbinol glycosidation of 17p-estradiol and derivatives thereof, Synlett, 12 (2005) 1848-1852. [Pg.90]

Anionic nucleophiles provide valuable and versatile routes for the preparation of C-glycosides. However, the most extensively used technologies lie within the chemistry of Lewis acid-mediated reactions of carbohydrates with unsaturated hydrocarbons and derivatives thereof. In the next series of examples, reactions of sugars and sugar derivatives with olefins and their silyl-, stannyl-, and aluminum derivatives are discussed. [Pg.297]

Each of the sections thus far has dealt with methods used in the conversion of natural sugars, and derivatives thereof, to C-glycosides. Deviating from this trend, this section addresses the formation of C-glycosides from non-carbohydrate substrates. Specifically, the formation of the sugar ring is the focus of the chemistry discussed. Several methods for the execution of this approach are... [Pg.343]

Glycosides, Disaccharides and Derivatives Thereof. - Methyl a-D-galactopyranoside-3-(sodium sulfate), methyl a-L-rhamnopyranoside and o-iodophenyl P-D-galactopyranoside, methyl-p-L-r/ireo-D-ga/ocro-8-nonulosopyranosidc. 9... [Pg.320]

Nucleosides and their Analogues and Derivatives Thereof.- l-(3, 5 -Di-0-benzoyl-r-C-allyl-P-D-arabino-furanosyl)uraciI 69, 3-P-D-ribofuranosyl-6,7-dihydro-9H-thiazolo(3,2-a]purin-9-onc 70,and sodium 5-bromo-cytidine-5 -phosphate. The X-ray structure of 3-methyl-7-deazainosine (71) showed a conformation fixed anti about the glycosidic bond. 2 3 -Dideoxy-3 -methylamino-ribosylthymine (ddT(3 NHMe)), P-5-isopropyl-2 -deoxyuridine, 5-... [Pg.327]

Glycosides, Disaccharides and Derivatives Thereof. - Penta-O-benzoyl-a-D-fructofuranose adopts an E2 configuration. An X-ray of methyl a-D-arabinofuranoside bound to concanavalin A has been reported. ... [Pg.328]

Nucleoades and their Analogues and Derivatives Thereof. - 5-Acetyi-l-(3,5-0-isopropylidene-a-D-xylofuranosyl)uracil monohydrate has the furanose ring in a C2 -endo, C3 -endo conformation and a glycosidic torsion angle of —31°. X-ray structures of adenosine, cytidine, uridine and thymidine were interpreted in terms of C-H-- 0 interactions, while guanosine lacks these interactions. Another structural analysis of cytidine was reported and studies of crystal... [Pg.334]

Neutral sugars, amino-sugars, alditols and derivatives thereof. - The h.p.l.c.-thennosinray m.s. of thirty monosaccharides and their derivatives has been reported. Trace levels of monosaccharides released by hydrolysis of glycosides from grape musts, and maniutol, 3-O-methyl-D-glucose and... [Pg.301]

Saponins are a family of glycosides (sugar derivatives) widely distributed in plants. Each saponin consists of a sugar moiety bound to a sapogenin (either a steroid or a triterpene). The immunostimulatory properties of the saponin fraction isolated from the bark of Quillaja (a tree) has been long recognized. Quil A (which consists of a mixture of related saponins) is used as an adjuvant in selected veterinary vaccines. However, its haemolytic potential precludes its use in human vaccines. Research efforts continue in an attempt to identify individual saponins (or derivatives thereof) that would make safe and effective adjuvants for use in human medicine. [Pg.415]

Similar to glycosides, anhydro derivatives involving the anomeric oxygen, which can be considered as internal glycosides, can also be cleaved by a Lewis acid in the presence of a thiol, or a TMS-derivative thereof, to give thioglycosides. Examples with 1,2- and 1,6-anhydro... [Pg.675]

Glycosides and Simple Derivatives Thereof. — Methyl jS-D-arabinopyranoside, methyl a- and -D-galactopyranoside (n.d.), methyl 3,6-dideoxy-j3-D-riho-... [Pg.217]

Glycosides and Simple Derivatives Thereof. — Methyl 2,3,4-tri-O-benzoyl-0-D-xylopyranoside, methyl 2,3,4,5-tetra-0-acetyl-o -D-galactoseptanoside, 2-pyridyl l-thio-/3-D-glucopyranoside, the three methyl xanthates of methyl 4,6-... [Pg.204]

Their reactions closely resemble those of 1,6-anhydrohexoses (compare Sect. IV) for the glycosyl group thereof, all reactions common for glycosides can be performed. The difference in the rate of hydrolysis of the 1,6-anhydride and the glycosidic bond permits a partial hydrolysis of 1,6-anhydro derivatives of oligosaccharides, leading to the... [Pg.161]

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