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【结 构 式】

【分子编号】12812

【品名】[(2R,3R,4S,5R)-4-bromo-5-(6-hydroxy-9H-purin-9-yl)-3-[(phenoxycarbothioyl)oxy]tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate

【CA登记号】

【 分 子 式 】C23H23BrN4O8S

【 分 子 量 】595.42778

【元素组成】C 46.4% H 3.89% Br 13.42% N 9.41% O 21.5% S 5.39%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(Vb)

A new synthesis of ddI has been described: The reaction of inosine (I) with 2-acetoxyisobutyryl bromide (II) gives a mixture of two bromodiacyloxy derivatives (IIIa) and (IIIb) that, without separation, are hydrolyzed either with ammonia in methanol or with the pair Zn-Cu in the same solvent, yielding a mixture of the 2- and 3-bromo derivatives (IVa) and (IVb). The acylation of this mixture with chlorothionoformic acid O-phenyl ester and dimethylaminopyridine (DMAP) in acetonitrile gives a new mixture of the thiono esters (Va) and (Vb), which is treated with tributyltin hydride and azoisobutyronitrile (AIBN) in refluxing benzene to yield 5'-O-(2-acetoxyisobutyryl)-2',3'-didehydro-2',3'-dideoxyinosine (VI). The hydrolysis of (VI) with ammonia in methanol affords 2',3'-didehydro-2',3'-dideoxyinosine (VII), which is finally hydrogenated with H2 over Pd/C.

1 Dorland, E.; Serafinowski, P.; A convenient method for the synthesis of 2',3'-dideoxynucleosides. Antivir Res 1992, 17, (Suppl. 1), Abst 26.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IIIa) 12807 [(2R,3S,4S,5R)-4-(acetoxy)-3-bromo-5-(6-hydroxy-9H-purin-9-yl)tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C18H21BrN4O8 详情 详情
(IIIb) 12808 [(2R,3R,4S,5R)-3-(acetoxy)-4-bromo-5-(6-hydroxy-9H-purin-9-yl)tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C18H21BrN4O8 详情 详情
(IVa) 12809 [(2R,3R,4S,5R)-3-bromo-4-hydroxy-5-(6-hydroxy-9H-purin-9-yl)tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C16H19BrN4O7 详情 详情
(IVb) 12810 [(2R,3R,4S,5R)-4-bromo-3-hydroxy-5-(6-hydroxy-9H-purin-9-yl)tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C16H19BrN4O7 详情 详情
(Va) 12811 [(2R,3S,4S,5R)-3-bromo-5-(6-hydroxy-9H-purin-9-yl)-4-[(phenoxycarbothioyl)oxy]tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C23H23BrN4O8S 详情 详情
(Vb) 12812 [(2R,3R,4S,5R)-4-bromo-5-(6-hydroxy-9H-purin-9-yl)-3-[(phenoxycarbothioyl)oxy]tetrahydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C23H23BrN4O8S 详情 详情
(I) 12795 (2R,3S,4R,5R)-2-(Hydroxymethyl)-5-(6-hydroxy-9H-purin-9-yl)tetrahydro-3,4-furandiol; Inosine 58-63-9 C10H12N4O5 详情 详情
(II) 12806 2-bromo-1,1-dimethyl-2-oxoethyl acetate; alpha-Acetoxy-isobutyryl bromide 40635-67-4 C6H9BrO3 详情 详情
(VI) 12813 [(2S,5R)-5-(6-hydroxy-9H-purin-9-yl)-2,5-dihydro-2-furanyl]methyl 2-(acetoxy)-2-methylpropanoate C16H18N4O6 详情 详情
(VII) 12799 9-[(2R,5S)-5-(Hydroxymethyl)-2,5-dihydro-2-furanyl]-9H-purin-6-ol C10H10N4O3 详情 详情
Extended Information