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【结 构 式】 
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【分子编号】17655 【品名】(1S,4R)-4-(acetamido)-2-cyclopenten-1-yl acetate 【CA登记号】 |
【 分 子 式 】C9H13NO3 【 分 子 量 】183.20716 【元素组成】C 59% H 7.15% N 7.65% O 26.2% |
合成路线1
该中间体在本合成路线中的序号：(XIV)3) The condensation of (±)-cis-4-acetamido-2-cyclopentenylmethyl acetate (XIV) with 2-amino-4,6-dichloropyrimidine (XV) by means of Ba(OH)2 and triethylamine in refluxing butanol gives the expected condensation product (XVI), which is treated with 4-chlorophenyldiazonium chloride (XVII) in water/acetic acid to yield the corresponding azo-compound (XVIII). The reduction of (XVIII) with Zn/acetic acid in ethanol affords the diamine (XIX), which is cyclized with refluxing diethoxymethyl acetate (XX) to afford the corresponding purine (XXI). The reaction of (XXI) with cyclopropylamine (X) in refluxing ethanol affords racemic abacavir (XXII), which is phosphorylated with POCl3 giving the racemic 4'-O-phosphate (XXIII). Finally, this compound is submitted to stereoselective enzymatic dephosphorylation using snake venom 5'-nucleotidase (EC 3.1.3.5) from Crotalus atrox yielding the (-)-enantiomer, abacavir.
| 【1】 Graul, A.; Castaner, J.; Leeson, P.A.; Abacavir Sulfate. Drugs Fut 1998, 23, 11, 1155-1167. |
| 【2】 Daluge, S.M. (Glaxo Wellcome plc); Therapeutic nucleosides. EP 0434450; JP 1996092252; JP 1999158160; JP 1999343292 . |
| 【3】 Daluge, S.M. (Glaxo Wellcome plc); Therapeutic nucleosides. AU 8937025; EP 0349242; JP 1990045486; JP 1999139976; US 5034394; US 5089500 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (X) | 12263 | Cyclopropylamine; Cyclopropanamine | 765-30-0 | C3H7N | 详情 | 详情 |
| (XIV) | 17655 | (1S,4R)-4-(acetamido)-2-cyclopenten-1-yl acetate | C9H13NO3 | 详情 | 详情 | |
| (XV) | 14404 | 4,6-dichloro-2-pyrimidinamine; 2-Amino-4,6-dichloropyrimidine; 4,6-dichloro-2-pyrimidinylamine | 56-05-3 | C4H3Cl2N3 | 详情 | 详情 |
| (XVI) | 17657 | [(1S,4R)-4-[(2-amino-6-chloro-4-pyrimidinyl)amino]-2-cyclopenten-1-yl]methanol | C10H13ClN4O | 详情 | 详情 | |
| (XVII) | 10197 | 4-Chlorobenzenediazonium chloride | C6H4Cl2N2 | 详情 | 详情 | |
| (XVIII) | 17659 | [(1S,4R)-4-([2-amino-6-chloro-5-[(E)-2-(4-chlorophenyl)diazenyl]-4-pyrimidinyl]amino)-2-cyclopenten-1-yl]methanol | C16H16Cl2N6O | 详情 | 详情 | |
| (XIX) | 17660 | [(1S,4R)-4-[(2,5-diamino-6-chloro-4-pyrimidinyl)amino]-2-cyclopenten-1-yl]methanol | C10H14ClN5O | 详情 | 详情 | |
| (XX) | 17661 | Diethoxymethyl acetate | 14036-06-7 | C7H14O4 | 详情 | 详情 |
| (XXI) | 17650 | [(1S,4R)-4-(2-amino-6-chloro-9H-purin-9-yl)-2-cyclopenten-1-yl]methanol | C11H12ClN5O | 详情 | 详情 | |
| (XXII) | 17663 | [(1S,4R)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-2-cyclopenten-1-yl]methanol | C14H18N6O | 详情 | 详情 | |
| (XXIII) | 17664 | [(1S,4R)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-2-cyclopenten-1-yl]methyl dihydrogen phosphate | C14H19N6O4P | 详情 | 详情 |