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Unsaturated monosaccharides

Isotopic substitution and isotopic labelling 2-Carb-17. Unsaturated monosaccharides... [Pg.45]

Dithiocetals, thioglycosides preparation, 181 DNA, disaggregation, ultrasonic irradiation, 11 Double bonds, unsaturated monosaccharides,... [Pg.485]

Thiols, thioglycosides preparation, 183 2,3,4-Tri-O-ethylamylose, structure, 412 Triple bonds, unsaturated monosaccharides, 95-96... [Pg.491]

Fig. 35 Unsaturated sugar lactones obtained from monosaccharides. Fig. 35 Unsaturated sugar lactones obtained from monosaccharides.
Unsaturated monosaccharides [e.g. (91)] react with the Ph3P-DAD combination in the presence of phthalimide, with inversion of configuration of C-4, to form the phthalimido-derivatives (92).82 Treatment of carbohydrates having a free anomeric OH group with 6-chloropurine, DAD, and methyldiphenylphosphine gives the purine nucleosides (93).83... [Pg.15]

Carbohydrates Ceiiuiose Starch 1 Hemiceiiuiose Lignin J ( monosaccharides "j ( hexoses "j Cx(H20)y < oligosaccharides > pentoses > [ chitin J ( glucosamine J (C2H20)4 unsaturated aromatic alcohols —> polyhydroxy carboxylic aoids HPOy, GO2, CH4, glucose, fructose, galactose, arabinose, ribose, xylose... [Pg.625]

C-N.m.r. Data for Difluorinated Monosaccharides, Including Anhydro and Unsaturated Derivatives... [Pg.175]

Eur. J. Biochem. (1980) 111, 295-298 Nomenclature of unsaturated monosaccharides Eur. J. Biochem. (1981) 119, 1-3 Nomenclature of branched-chain monosaccharides Eur. J. Biochem. (1981) 119, 5-8 Abbreviated terminology of oligosaccharide chains /. Biol Chem. (1982) 257, 3347-3351 Polysaccharide nomenclature /. Biol Chem. (1982) 257, 3352-3354 Symbols for specifying the conformation of polysaccharide chains... [Pg.83]

This conversion of readily available 2-furyl alcohols into unsaturated pyranosuloses proved a very effective route to racemic monosaccharides, through stepwise, selective functionalization of the enone grouping in 325. The shortest synthesis of a natural compound by following this scheme involves palladium-catalyzed hydrogenation of the aldosulose (325, R = Me) obtained from l-(2-furyl)ethanol, resulting209 in cinerulose A, the sugar component of the antibiotic cine-rubin. [Pg.65]

Dehydrations have been observed to be caused by water-accepting reagents. Thus cyclic hemiacetal 259 was dehydrated with oxalic acid to 2,2,4-trimethyl-2//-pyran (260) in a 50% yield289 (for similar examples see Section IV,G,1 and IV,G,4). The dehydration of easily accessible hemi-acetals 263 to appropriate condensed 4//-pyrans, e.g., 263a - 27 and 263b - 264, proceed smoothly in an acidic medium.59,290 Similarly, dehydration 28 - 27 has been mentioned in Section III,A. A more complex dehydration agent consisting of phthalimide, triphenylphosphine, and diethyl azodicar-boxylate was used for the transformation of stereoisomeric unsaturated monosaccharides 261 to 2//-pyran 262 (15 to 26%).291... [Pg.210]

The IUPAC-IUBMB short form symbolism18 2-Carb-38.5 is used here and elsewhere in this chapter for designation of oligosaccharide structures. Parent monosaccharide residues are the d enantiomers except for IdoA, which is the l enantiomer. Uronic acid residues modified by 44-unsaturation are prefixed by A4tS, and the associated anomeric symbol relates to the configuration at the 5-position of that residue before 4,5-elimination. The abbreviation HexA is used to denote either d-G1cA or L-IdoA. [Pg.202]

See other pages where Unsaturated monosaccharides is mentioned: [Pg.95]    [Pg.95]    [Pg.181]    [Pg.91]    [Pg.169]    [Pg.47]    [Pg.47]    [Pg.176]    [Pg.49]    [Pg.84]    [Pg.575]    [Pg.427]    [Pg.435]    [Pg.18]    [Pg.48]    [Pg.64]    [Pg.72]    [Pg.618]    [Pg.204]    [Pg.56]    [Pg.13]    [Pg.149]    [Pg.48]    [Pg.218]    [Pg.262]    [Pg.294]    [Pg.72]    [Pg.40]    [Pg.23]    [Pg.59]    [Pg.272]    [Pg.89]    [Pg.234]    [Pg.1058]    [Pg.60]    [Pg.333]   
See also in sourсe #XX -- [ Pg.52 , Pg.91 ]



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