2.3.4- Tri-O-acetyl-/?-D-xylopyranosyl

Hexa-Ac (2,3,4-Tri-O-acetyl-a-D-xylopyranosyl) (2,3,4-tri-O-acetyl- -D-xylopyranosyl) amine [114244-99-4]... 

Specific structural assignments have been made for the 0-acetyl group resonances in H-n.m.r. of 1,2,3-tri-0-acetyl-4.-0-(2,3,4--tri-O-acetyl- -D-xylopyranosyl)-/8-D-xylopyranose. All six signals were separate at 200 MHz and identified by using specifically deuterated acetyl derivatives prepared from [ H Jacetic anhy-... 

Cl 1H12N8O11, 2-Methyl-5- N-nitrocarboxamido)-1-(2, 3, 5 -tri-0-nit-ro- -D-ribofuranosyl)imidazol-4-carboxamide, 46B, 433 Cl1H13NO7, p-Nitrophenyl- -D-xylopyranoside, 42B, 319 Cl1H15BrN20n, Arabinose p-bromophenylhydrazone, 27, 790 Cl 1H1 sBrN20i, Ribose-p-bromophenylhydrazone, 29, 489 C11H15CIO7, 2,3,4-Tri-O-acetyl- -D-xylopyranosyl chloride, 40B, 391 1,3,4-Tri-0-acetyl-2-desoxy-2-fluoro-a-D-xylopyranose,... 

Further reactions have been performed with 2,4-diethoxypyri-midine as the basic component and 2,3,4-tri-O-acetyl-L-arabino-pyranosyl bromide,7 2,3,4-tri-O-acetyl-a-D-xylopyranosyl bromide,7 2,3,4,6-tetra-O-acetyl-a-D-galactopyranosyl bromide,7 and 2,3,4-tri-O-acetyl-D-ribopyranosyl bromide8 as halogenoses the products... 

Glycosyl fluorides have also been prepared by treatment of per-O-acyl or partially 0-acylated sugars with hydrogen fluoride [liquid HF (for example, see Refs. 38 and 39) or HF in acetic acid or dichloromethane], as exemplified by 2,3,4-tri-O-benzyl-a-D-xylopyranosyl (18), a-D-glucopyranosyl (19), tetra-O-pivaloyl-a-D-glucopyranosyl (20), and 2,3,5-tri-O-acetyl-D-xylofur-anosyl fluorides (21) (see Table 1). Frequently, HF treatment - leads to... 

C9H20O4S2 D-Ribose diethyl dithioacetal (DRETAC)316 CuH15C107 Tri-0-acetyl-/ -D-xylopyranosyl chloride (TACXYP)317 CuH1605 2,3,4-Tri-O-acetyl-a-D-xylopyranose (TAXYLP)318 C12H220,i -HoO 6-O-a-D-Galactopyranosyl-a.fl-D-glucopyranose, monohydrate (MELIBM03)319... 

Conformational equilibria of 2,3,4-tri-O-acetyl-a-D-xylopyranosyl imidazole. The neutral compound exists as a mixture of both conformations, the protonated species exclusively in the lC4 conformation... 

Tri-O-acetyl- and -O-benzoyl-jS-D-xylopyranosyl fluoride i Ci and C4 conformations, respectively), D-glucose oxime (exists as the cyclic 3-gluco-... 

Benzyl 2- O -acetyl-3- O -metliyl-4- O -(2,3,4-tri- O -acetyl-p-D-xylopyranosyl)-p-D-xylopyranoside, X-80... 

Benzyl 2,3,4-tri-O-acetyl-l-thio-a-L-arabinopyranoside, T-57 Benzyl 3-0-(2,3,4-tri-0-acetyl-p-D-xylopyranosyl)-p-D-xylopyranoside, X-79 Benzyl 2,3,4-tri-O-benzoyl-p-L-arabinopyranoside, B-14 Benzyl 2,3,6-tri-O-benzoyl-a-D-glucopyranoside, B-16 Benzyl 2,3,4-tri-O-benzoyl-p-D-ribopyranoside, B-21 Benzyl l,3,4-tri-0-benzoyl-5-0-(2,3,4,6-tetra-0-benzyl-a-D-glucopyranosyl)-p-D-fructopyranoside, G-299... 

Tri-O-acetyl-2,3-anhydro-p-D-allofuranose, A-484 2,3,4-Tri-O-acetyl-1,5-anhydrobitol, A-689 p-D-Xylopyranosyl-(l 2)-p-D-xylopyranosyl-(l 4)-D-ribose ... 

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