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【结 构 式】 
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【分子编号】64344 【品名】4-bromo-3-methylbenzaldehyde 【CA登记号】 |
【 分 子 式 】C8H7BrO 【 分 子 量 】199.04698 【元素组成】C 48.27% H 3.54% Br 40.14% O 8.04% |
合成路线1
该中间体在本合成路线中的序号：(VI)Coupling of 2-bromobenzenesulfonyl chloride (I) with 5-amino-3,4-dimethylisoxazole (II) affords sulfonamide (III), which is further protected as the N-methoxyethoxymethyl derivative (IV) employing MEM-chloride in DMF. Lithiation of bromosulfonamide (IV), followed by treatment with trimethyl borate and acidic work up leads to the boronic acid intermediate (V). This is then subjected to Suzuki coupling with 4-bromo-3-methylbenzaldehyde (VI) to yield the biphenyl adduct (VII). After reduction of aldehyde (VII) to the benzylic alcohol (VIII) with NaBH4, reaction with methanesulfonyl chloride and diisopropylethylamine gives rise to the mesylate (IX) (1-3).
| 【1】 Tellew, J.E.; Baska, R.A.F.; Beyer, S.M.; Carlson, K.E.; Cornelius, L.A.; Fadnis, L.; Gu, Z..; Kunst, B.L.; Kowala, M.C.; Monshizadegan, H.; Murugesan, N.; Ryan, C.S.; Valentine, M.T.; Yang, Y.; Macor, J.E.; Discovery of 4'-[(Imidazol-1-yl)methyl]biphenyl-2-sulfonamides as dual endothelin/Angiotensin II receptor antagonists. Bioorg Med Chem Lett 2003, 13, 6, 1093. |
| 【2】 Macor, J.E.; Murugesan, N.; Gu, Z.; Tellew, J.E. (Bristol-Myers Squibb Co.); Biphenyl sulfonamides as dual angiotensin endothelin receptor antagonists. EP 1094816; JP 2002519380; US 2002143024; WO 0001389 . |
| 【3】 Macor, J.E.; Murugesan, N.; Gu, Z.; Tellew, J.E. (Bristol-Myers Squibb Co.); Biphenyl sulfonamides as dual angiotensin endothelin receptor antagonists. EP 1237888; WO 0144239 . |
| 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) | 26890 | 2-bromobenzenesulfonyl chloride | 2905-25-1 | C6H4BrClO2S | 详情 | 详情 |
| (II) | 26891 | 3,4-dimethyl-5-isoxazolamine | 19947-75-2 | C5H8N2O | 详情 | 详情 |
| (III) | 26892 | 2-bromo-N-(3,4-dimethyl-5-isoxazolyl)benzenesulfonamide | C11H11BrN2O3S | 详情 | 详情 | |
| (IV) | 26893 | 2-bromo-N-(3,4-dimethyl-5-isoxazolyl)-N-[(2-methoxyethoxy)methyl]benzenesulfonamide | C15H19BrN2O5S | 详情 | 详情 | |
| (V) | 60918 | 2-({(3,4-dimethyl-5-isoxazolyl)[(2-methoxyethoxy)methyl]amino}sulfonyl)phenylboronic acid | C15H21BN2O7S | 详情 | 详情 | |
| (VI) | 64344 | 4-bromo-3-methylbenzaldehyde | C8H7BrO | 详情 | 详情 | |
| (VII) | 64345 | N-(3,4-dimethyl-5-isoxazolyl)-4'-formyl-N-[(2-methoxyethoxy)methyl]-2'-methyl[1,1'-biphenyl]-2-sulfonamide | C23H26N2O6S | 详情 | 详情 | |
| (VIII) | 64346 | N-(3,4-dimethyl-5-isoxazolyl)-4'-(hydroxymethyl)-N-[(2-methoxyethoxy)methyl]-2'-methyl[1,1'-biphenyl]-2-sulfonamide | C23H28N2O6S | 详情 | 详情 | |
| (IX) | 64347 | [2'-({(3,4-dimethyl-5-isoxazolyl)[(2-methoxyethoxy)methyl]amino}sulfonyl)-2-methyl[1,1'-biphenyl]-4-yl]methyl methanesulfonate | C24H30N2O8S2 | 详情 | 详情 |