中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
甲基-beta-D-呋喃核糖苷 | 1-O-methyl-D-ribofuranose | 7473-45-2 | C6H12O5 | 164.158 |
卡培他滨杂质25 | D-Ribose | 613-83-2 | C5H10O5 | 150.131 |
(2R,3r,4r,5r)-2-甲氧基四氢-2H-吡喃-3,4,5-三醇 | methyl β-D-ribopyranoside | 91-09-8 | C6H12O5 | 164.158 |
D-吡喃核糖 | D-ribose | 10257-32-6 | C5H10O5 | 150.131 |
—— | (2R,3R,4R,5S)-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-5-methoxytetrahydrofuran | 79083-29-7 | C27H30O5 | 434.532 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ((2R,3S,4R,5S)-3,4-dihydroxy-5-methoxytetrahydrofuran-2-yl)methyl acetate | 116466-92-3 | C8H14O6 | 206.196 |
卡培他滨杂质25 | D-Ribose | 613-83-2 | C5H10O5 | 150.131 |
—— | 5'-amino-5'-deoxy-1'-O-methyl-D-ribose | 262600-85-1 | C6H13NO4 | 163.174 |
—— | methyl 2,3-O-isopropylidene-α-D-ribofuranoside | 58763-00-1 | C9H16O5 | 204.223 |
—— | (2S,3R,4S,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-2-methoxytetrahydrofuran-3-ol | 80795-53-5 | C20H24O5 | 344.408 |
—— | 5'-azido-5'-deoxy-1'-O-methyl-D-ribose | 656236-94-1 | C6H11N3O4 | 189.171 |
—— | (2R,3R,4R,5S)-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-5-methoxytetrahydrofuran | 79083-29-7 | C27H30O5 | 434.532 |
甲基3,5-二-O-(4-氯苄基)-Α-D-呋喃呋喃糖苷 | methyl 3,5-di-O-(4-chlorobenzyl)-α-D-ribofuranoside | 108008-66-8 | C20H22Cl2O5 | 413.298 |
—— | 5'-acrylamido-5'-deoxy-1'-O-methyl-D-ribose | 656236-95-2 | C9H15NO5 | 217.222 |
Rates of methanolysis reactions of D-xylose, D-arabinose, D-lyxose, and D-ribose have been determined. It was found that methanolysis of a pentose proceeds to equilibrium through four distinguishable, competing reactions: (1) pentose → furanosides; (2) anomerization of furanosides; (3) furanosides → pyranosides; (4) anomerization of pyranosides. The glycoside compositions at equilibrium are interpreted in terms of stabilities of each of the four glycosides from each sugar as influenced by steric and ionic effects; a system of conformational analysis of furanoside rings is presented. The free energies of reaction in anomerization of pyranosides were in excellent agreement with values calculated from previously reported interaction energies in the pyranoid ring. The relative rates of the reactions were consistent with the view that non-bonded interactions in the methyl glycosides are relieved in the transition states for their interconversions.