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【结 构 式】 
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【分子编号】56348 【品名】N-[(4aR,6R,7R,8R,8aS)-6-({(2R,3S,4R,5R,6S)-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]-4-[(E)-2-butenyloxy]tetrahydro-2H-pyran-3-yl}oxy)-8-(benzyloxy)-2,2-dimethylhexahydropyrano[3,2-d][1,3]dioxin-7-yl]acetamide 【CA登记号】 |
【 分 子 式 】C44H56N2O11 【 分 子 量 】788.93552 【元素组成】C 66.99% H 7.15% N 3.55% O 22.31% |
合成路线1
该中间体在本合成路线中的序号：(XXXI)Glycosylation of the protected glucosamine (XXVI) with the glucopyranooxazoline (XXVII) was effected in the presence of p-toluenesulfonic acid in dichloroethane to give the protected chitobioside derivative (XXVIII). Methanolysis of the acetate esters of (XXVIII), followed by protection of the resultant triol (XXIX) with acetone dimethylacetal, gave rise to the 4',6'-isopropylidene derivative (XXX). The 3'-hydroxyl group of (XXX) was then protected as the benzyl ether (XXXI) with benzyl bromide in the presence of Ba(OH)2 and BaO. Removal of the 2-butenyl group of (XXXI) to furnish (XXXII) was performed by means of potassium tert-butoxide in hot DMSO. Subsequent alkylation of (XXXII) with (S)-2-chloropropionic acid (XI) led to acid (XXXIII).
| 【1】 Kiso, M.; et al.; A general, convenient synthesis of the repeating, disaccharide-dipeptide unit of the bacterial, cell-wall peptidoglycan by the oxazoline method. Carbohydr Res 1980, 83, 1, C8. |
| 【2】 Kiso, M.; et al.; Synthesis and immunoadjuvant activities of the repeating, disaccharide-dipeptide unit of the bacterial, cell-wall peptidoglycan and of some carbohydrate analogs. Carbohydr Res 1982, 104, 2, 253. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XI) | 56332 | (S)-(-)-2-Chloropropionic acid; (S)-2-Chloropropionic acid | 29617-66-1 | C3H5ClO2 | 详情 | 详情 |
| (XXVI) | 56344 | N-{(2S,3R,4R,5S,6R)-2-(benzyloxy)-6-[(benzyloxy)methyl]-4-[(E)-2-butenyloxy]-5-hydroxytetrahydro-2H-pyran-3-yl}acetamide | C26H33NO6 | 详情 | 详情 | |
| (XXVII) | 21969 | (3aR,5R,6R,7R,7aR)-6-(acetoxy)-5-[(acetoxy)methyl]-2-methyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d][1,3]oxazol-7-yl acetate | C14H19NO8 | 详情 | 详情 | |
| (XXVIII) | 56345 | (2R,3R,4R,5R,6R)-3-(acetylamino)-2-({(2R,3S,4R,5R,6S)-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]-4-[(E)-2-butenyloxy]tetrahydro-2H-pyran-3-yl}oxy)-5-(acetyloxy)-6-[(acetyloxy)methyl]tetrahydro-2H-pyran-4-yl acetate | C40H52N2O14 | 详情 | 详情 | |
| (XXIX) | 56346 | N-[(2S,3R,4R,5S,6R)-2-({(2R,3S,4R,5R,6S)-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]-4-[(E)-2-butenyloxy]tetrahydro-2H-pyran-3-yl}oxy)-4,5-dihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-3-yl]acetamide | C34H46N2O11 | 详情 | 详情 | |
| (XXX) | 56347 | N-[(4aR,6R,7R,8R,8aS)-6-({(2R,3S,4R,5R,6S)-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]-4-[(E)-2-butenyloxy]tetrahydro-2H-pyran-3-yl}oxy)-8-hydroxy-2,2-dimethylhexahydropyrano[3,2-d][1,3]dioxin-7-yl]acetamide | C37H50N2O11 | 详情 | 详情 | |
| (XXXI) | 56348 | N-[(4aR,6R,7R,8R,8aS)-6-({(2R,3S,4R,5R,6S)-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]-4-[(E)-2-butenyloxy]tetrahydro-2H-pyran-3-yl}oxy)-8-(benzyloxy)-2,2-dimethylhexahydropyrano[3,2-d][1,3]dioxin-7-yl]acetamide | C44H56N2O11 | 详情 | 详情 | |
| (XXXII) | 56349 | N-[(4aR,6R,7R,8R,8aS)-6-({(2R,3S,4R,5R,6S)-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]-4-hydroxytetrahydro-2H-pyran-3-yl}oxy)-8-(benzyloxy)-2,2-dimethylhexahydropyrano[3,2-d][1,3]dioxin-7-yl]acetamide | C40H50N2O11 | 详情 | 详情 | |
| (XXXIII) | 56350 | (2R)-2-({(2R,3S,4R,5R,6S)-3-{[(4aR,6R,7R,8R,8aS)-7-(acetylamino)-8-(benzyloxy)-2,2-dimethylhexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxy}-5-(acetylamino)-6-(benzyloxy)-2-[(benzyloxy)methyl]tetrahydro-2H-pyran-4-yl}oxy)propanoic acid | C43H54N2O13 | 详情 | 详情 |