中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
((2R,3R,4S,5S,6S)-3,4,5-三(苄氧基)-6-甲氧基四氢-2H-吡喃-2-基)甲醇 | methyl 2,3,4-tri-O-benzyl-α-D-mannopyranoside | 34212-64-1 | C28H32O6 | 464.558 |
甲基2,3,4-三-O-苄基-α-D-吡喃葡萄糖苷 | methyl 2,3,4-tri-O-benzyl-D-glucopyranoside | 53008-65-4 | C28H32O6 | 464.558 |
—— | methyl 7-O-allyl-2,3,4-tri-O-benzyl-D-glycero-α-D-gluco-heptopyranoside | 321142-22-7 | C32H38O7 | 534.65 |
—— | methyl 6-deoxy-2,3,4-tri-O-benzyl-α-D-gluco-hepto-1,7-dialdopyranoside | 174155-13-6 | C29H32O6 | 476.569 |
—— | Methyl 2,3,4-tri-O-benzyl-7,8-dideoxy-D-glycero-α-D-gluco-oct-7-enopyranoside | 103597-19-9 | C30H34O6 | 490.596 |
—— | methyl-2,3,4-tri-O-benzyl-7,7,8,8-tetradehydro-7,8-dideoxy-α-D-glycero-D-gluco-octopyranoside | 103597-18-8 | C30H32O6 | 488.58 |
—— | (2S,3R,4S,5R,6R)-3,4,5-Tris-benzyloxy-2-methoxy-6-vinyl-tetrahydro-pyran | 127214-37-3 | C29H32O5 | 460.57 |
—— | methyl 6-aldehydo-2,3,4-tri-O-benzyl-α-D-glucopyranoside | 83051-88-1 | C28H30O6 | 462.543 |
—— | methyl 2,3,4-tri-O-benzyl-α-D-manno-hexodialdo-1,5-pyranoside | 40653-15-4 | C28H30O6 | 462.543 |
—— | (E,1R,4S,5R,6R)-6-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-1-[(2R,3S,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]-4,5,6-tris(phenylmethoxy)hex-2-en-1-ol | 1049006-96-3 | C59H66O11 | 951.166 |
—— | methyl (methyl-2,3,4-tri-O-benzyl-α-D-glucopyranosid)uronate | 55610-71-4 | C29H32O7 | 492.569 |
—— | (E,1R)-3-[(4R,5S)-5-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-1,3-dioxolan-4-yl]-1-[(2R,3S,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]prop-2-en-1-ol | 220172-58-7 | C40H50O10 | 690.831 |
—— | (E)-(R)-3-((3aR,5R,5aS,8aS,8bR)-2,2,7,7-Tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-yl)-1-((2R,3S,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-yl)-prop-2-en-1-ol | 220172-63-4 | C41H50O11 | 718.841 |
—— | (E)-3-[(4R,5S)-5-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-1,3-dioxolan-4-yl]-1-[(2S,3S,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]prop-2-en-1-one | 220172-57-6 | C40H48O10 | 688.815 |
—— | dimethyl (methyl 2,3,4-tri-O-benzyl-D-gluco-heptopyranos-6-ulos-7-yl)phosphonate | 220172-55-4 | C31H37O9P | 584.603 |
—— | (E)-3-((3aR,5R,5aS,8aS,8bR)-2,2,7,7-Tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-yl)-1-((2S,3S,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-yl)-propenone | 220172-62-3 | C41H48O11 | 716.826 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl 2,3,4-tri-O-benzyl-L-glycero-α-D-gluco-heptopyranoside | 103597-24-6 | C29H34O7 | 494.585 |
An exploration of the synthesis of D-glycero-D-altro-heptose, a constitutent of O antigen chains in lipopolysaccharides from Campylobacter jejuni serotypes O:23 and O:36 led to a study of the 2-trimethylsilylthiazole homologation procedure for heptose synthesis. In contrast to the diastereoselective formation of a 1,2:3,4-di-O-isopropylidene-D-glycero-α-D-galacto-heptopyranose derivative from 1,2:3,4-di-O-isopropylidene-α-D-galacto-hexodialdo-1,5-pyranose, methyl 2,3,4-tri-O-benzyl-D-hexodialdo-1,5-pyranosides with the gluco and manno configurations showed no preference for the formation of compounds with the D-glycero configuration. Attempts to achieve high diastereoselectivity in the conversion of L-glycero into the D-glycero isomers by oxidation at C-6 followed by reduction with L-selectride were unsuccessful with the thiazole adducts, but the desired products were formed in similar reactions of methyl 2,3,4-tri-O-benzyl-7-O-tert-butyldimethylsilyl-D-heptopyranosides. The approach to homologation in the altro series was thwarted by epimerization at C-5 in the attempted formation of methyl 2,3,4-tri-O-benzyl-α-D-altro-hexodialdo-1,5-pyranoside. The successful synthesis of methyl D-glycero-α-D-altro-heptopyranoside from methyl α-D-glucopyranoside was achieved by homologation followed by configurational alteration from the D-gluco to the D-altro series.