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【结 构 式】 
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【分子编号】54868 【品名】N-(2,3-dihydro-1,4-benzodioxin-6-yl)acetamide 【CA登记号】 |
【 分 子 式 】C10H11NO3 【 分 子 量 】193.20228 【元素组成】C 62.17% H 5.74% N 7.25% O 24.84% |
合成路线1
该中间体在本合成路线中的序号：(II)Benzodioxan-6-amine (I) was protected as the corresponding acetanilide (II), which was subsequently subjected to Friedel-Crafts condensation with chloroacetyl chloride (III) in the presence of ZnCl2, yielding the chloro ketone (IV). Acidic hydrolysis of the acetamide function of (IV) provided amino ketone (V). Alternatively, intermediate (V) was prepared by direct acylation of aniline (I) employing chloroacetonitrile (VI) in the presence of BCl3. The 7-(chloromethyl)camptothecin derivative (VIII) was synthesized through a Friedlander condensation between amino ketone (V) and the known keto lactone (VII). Finally, displacement of the chloride of (VIII) with N-methylpiperazine (IX) gave rise to the title piperazinylmethyl camptothecin.
| 【1】 Luzzio, M.J.; et al.; Synthesis and antitumor activity of novel water soluble derivatives of camptothecin as specific inhibitors of topoisomerase I. J Med Chem 1995, 38, 3, 395. |
| 【2】 Luzzio, M.J.; Besterman, J.M.; Evans, M.G.; Myers, P.L. (GlaxoSmithKline plc); Water soluble camptothecin derivs.. EP 0540099; JP 1993222048; JP 2000109475; US 5559235 . |
| 【3】 Sternbach, D.D.; Lackey, K. (GlaxoSmithKline Inc.); Preparation of water soluble camptothecin derivs.. US 5342947 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (I) | 54867 | 1,4-Benzodioxan-6-amine; 3,4-Ethylenedioxyaniline; 6-Amino-1,4-benzodioxane | 22013-33-8 | C8H9NO2 | 详情 | 详情 |
| (II) | 54868 | N-(2,3-dihydro-1,4-benzodioxin-6-yl)acetamide | C10H11NO3 | 详情 | 详情 | |
| (III) | 11296 | 2-Chloroacetyl chloride; Chloroacetic chloride | 79-04-9 | C2H2Cl2O | 详情 | 详情 |
| (IV) | 54869 | N-[7-(2-chloroacetyl)-2,3-dihydro-1,4-benzodioxin-6-yl]acetamide | C12H12ClNO4 | 详情 | 详情 | |
| (V) | 54870 | 1-(7-amino-2,3-dihydro-1,4-benzodioxin-6-yl)-2-chloro-1-ethanone | C10H10ClNO3 | 详情 | 详情 | |
| (VI) | 14443 | 2-chloroacetonitrile; chloroacetonitrile | 107-14-2 | C2H2ClN | 详情 | 详情 |
| (VII) | 10841 | (4S)-4-Ethyl-4-hydroxy-7,8-dihydro-1H-pyrano[3,4-f]indolizine-3,6,10(4H)-trione | C13H13NO5 | 详情 | 详情 | |
| (VIII) | 54871 | (8S)-15-(chloromethyl)-8-ethyl-8-hydroxy-2,3-dihydro-11H-[1,4]dioxino[2,3-g]pyrano[3',4':6,7]indolizino[1,2-b]quinoline-9,12(8H,14H)-dione | C23H19ClN2O6 | 详情 | 详情 | |
| (IX) | 10061 | 1-Methylpiperazine; 1-Methyl piperazine; N-Methylpiperazine | 109-01-3 | C5H12N2 | 详情 | 详情 |