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【结 构 式】 
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【分子编号】32828 【品名】(2S)-4-(4-methoxyphenyl)-2-[(2,2,2-trifluoroacetyl)amino]butyric acid 【CA登记号】 |
【 分 子 式 】C13H14F3NO4 【 分 子 量 】305.2537096 【元素组成】C 51.15% H 4.62% F 18.67% N 4.59% O 20.97% |
合成路线1
该中间体在本合成路线中的序号：(XVIII)The chiral intermediate 7-methoxy-1,2,3,4-tetrahydronaphthalen-2(S)-amine (IV) has also been obtained as follows: The Friedel Crafts condensation of anisole (XV) with N-trifluoroacetyl-L-aspartic acid anhydride (XVI) by means of AlCl3 in dichloromethane gives 4-(4-methoxyphenyl)-4-oxo-2(S)-(trifluoro-acetamido)butyric acid (XVII), which is hydrogenated with H2 over Pd/C in ethanol/H2SO4 yielding 4-(4-methoxyphenyl)-2(S)-(trifluoroacetamido)butyric acid (XVIII). The cyclization of (XVIII) by its reaction with PCl5, followed by a treatment with SnCl4 provides the tetralone (XIX), which is hydrogenated as before to give N-(7-methoxy-1,2,3,4-tetrahydronaphthalen-2(S)-yl)trifluoro-acetamide (XX). Finally, this compound is deacetylated with HCl in ethanol to provide the chiral intermediate the amine (IV).
| 【1】 Devocelle, M.; et al.; Alternative synthesis of the chiral atypical beta-adrenergic phenylethanolaminotetraline agonist SR58611A using enantioselective hydrogenation. Tetrahedron Lett 1999, 40, 24, 4551. |
| 【2】 Cecchi, R.; et al.; Synthesis and beta-adrenergic activity of atypical beta-adrenergic phenylethanolaminotetralin stereoisomers. Eur J Med Chem 1994, 29, 4, 259. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (IV) | 32820 | (2S)-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenylamine; (2S)-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenamine | C11H15NO | 详情 | 详情 | |
| (XV) | 18410 | N-[(3S)-2,5-dioxotetrahydro-3-furanyl]-2,2,2-trifluoroacetamide | 777-33-3 | C6H4F3NO4 | 详情 | 详情 |
| (XVI) | 23767 | Methoxybenzene; Methyl phenyl ether; Anisole | 100-66-3 | C7H8O | 详情 | 详情 |
| (XVII) | 32827 | (2S)-4-(4-methoxyphenyl)-4-oxo-2-[(2,2,2-trifluoroacetyl)amino]butyric acid | C13H12F3NO5 | 详情 | 详情 | |
| (XVIII) | 32828 | (2S)-4-(4-methoxyphenyl)-2-[(2,2,2-trifluoroacetyl)amino]butyric acid | C13H14F3NO4 | 详情 | 详情 | |
| (XIX) | 32829 | 2,2,2-trifluoro-N-[(2S)-7-methoxy-1-oxo-1,2,3,4-tetrahydro-2-naphthalenyl]acetamide | C13H12F3NO3 | 详情 | 详情 | |
| (XX) | 32830 | 2,2,2-trifluoro-N-[(2S)-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenyl]acetamide | C13H14F3NO2 | 详情 | 详情 |