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【结 构 式】 
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【分子编号】58236 【品名】5-bromo-2-chloro-3-methylpyridine 【CA登记号】 |
【 分 子 式 】C6H5BrClN 【 分 子 量 】206.46914 【元素组成】C 34.9% H 2.44% Br 38.7% Cl 17.17% N 6.78% |
合成路线1
该中间体在本合成路线中的序号：(VII)5-Bromo-2-chloro-3-methylpyridine (VII) is treated with aqueous methylamine to yield the aminopyridine derivative (VIII), which is further acetylated to (IX) using acetic anhydride in pyridine. Stannylation of the bromopyridine (IX) by means of hexabutylditin in the presence of palladium catalyst gives rise to the tributylstannyl pyridine (X). This compound is then subjected to Stille coupling with the bromoquinoline (VI) to furnish the corresponding pyridyl quinoline adduct (XI). Basic hydrolysis of the ethyl ester group of (XI) provides the quinolinecarboxylic acid (XII). The N-acetyl group of (XII) is finally hydrolyzed under acidic conditions to give the title compound.
| 【1】 Hayashi, K.; Yamakawa, T.; Kawafuchi, H.; Kito, T.; Mitsuyama, J.; Kuroda, H. (Toyama Chemical Co., Ltd.); Quinolonecarboxylic acid derivs. or salts thereof. EP 1070713; WO 9951588 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (VI) | 58235 | ethyl 7-bromo-1-cyclopropyl-8-methyl-4-oxo-1,4-dihydro-3-quinolinecarboxylate | C16H16BrNO3 | 详情 | 详情 | |
| (VII) | 58236 | 5-bromo-2-chloro-3-methylpyridine | C6H5BrClN | 详情 | 详情 | |
| (VIII) | 58237 | N-(5-bromo-3-methyl-2-pyridinyl)-N-methylamine; 5-bromo-N,3-dimethyl-2-pyridinamine | C7H9BrN2 | 详情 | 详情 | |
| (IX) | 58238 | N-(5-bromo-3-methyl-2-pyridinyl)-N-methylacetamide | C9H11BrN2O | 详情 | 详情 | |
| (X) | 58239 | N-methyl-N-[3-methyl-5-(tributylstannyl)-2-pyridinyl]acetamide | C21H38N2OSn | 详情 | 详情 | |
| (XI) | 58240 | ethyl 7-{6-[acetyl(methyl)amino]-5-methyl-3-pyridinyl}-1-cyclopropyl-8-methyl-4-oxo-1,4-dihydro-3-quinolinecarboxylate | C25H27N3O4 | 详情 | 详情 | |
| (XII) | 58241 | 7-{6-[acetyl(methyl)amino]-5-methyl-3-pyridinyl}-1-cyclopropyl-8-methyl-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid | C23H23N3O4 | 详情 | 详情 |