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【结 构 式】

【分子编号】24285

【品名】7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one

【CA登记号】

【 分 子 式 】C12H13NO3

【 分 子 量 】219.24016

【元素组成】C 65.74% H 5.98% N 6.39% O 21.89%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(V)

The reaction of 3,4-dimethoxyphenylacetic acid (I) with SOCl2 in methylene chloride gives the corresponding acyl chloride (II), which is treated with aminoacetaldehyde dimethylacetal (III) and triethylamine in methylene chloride yielding N-(2,2-diethoxyethyl)-3,4-dimethoxyphenylacetamide (IV). The cyclization of (IV) by means of HCl in acetic acid atfords 7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one (V), which is alkylated with 1-bromo-3-chloro propane (VI) by means of potassium tert-butoxide in DMSO to give 3-(3-chloropropyl)-7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one (VII). The reaction of (VII) with N-methyl-2-(3,4-dimethoxyphenyl)ethylamine (VIII) at 100 C affords 7,8-dimethoxy-3-[3-[N-methyl-N-[2-(3,4-dimethoxyphenyl)ethyl]amino]propyl]-1,3-dihydro-2H-3-benzazepin-2-one (IX), which is finally hydrogenated with H2 over Pd/C in acetic acid.

1 Reiffen, M.; et al. (Dr. Karl Thomae GmbH); Benzazepines, process for their preparation and their application as pharmaceutical preparations. DE 3119874; EP 0065229; GB 2099425; JP 57193462 .
2 Reiffen, M. (Dr. Karl Thomae GmbH); Process for the prepaation of benzazepine derivatives. CA 1207764; DD 215541; DE 3242345 .
3 Prous, J.; Castaner, J.; Ul-FS-49. Drugs Fut 1985, 10, 8, 639.
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) 24049 2-(3,4-dimethoxyphenyl)acetic acid 93-40-3 C10H12O4 详情 详情
(II) 20594 2-(3,4-dimethoxyphenyl)acetyl chloride C10H11ClO3 详情 详情
(III) 10331 2,2-Diethoxy-1-ethanamine; 2,2-Diethoxyethylamine; Aminoacetaldehyde diethyl acetal 645-36-3 C6H15NO2 详情 详情
(IV) 24284 N-(2,2-diethoxyethyl)-2-(3,4-dimethoxyphenyl)acetamide C16H25NO5 详情 详情
(V) 24285 7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one C12H13NO3 详情 详情
(VI) 10358 1-Bromo-3-chloropropane 109-70-6 C3H6BrCl 详情 详情
(VII) 18398 1-(tert-butyl) 3-ethyl (3R,4R)-4-phenyl-1,3-piperidinedicarboxylate C19H27NO4 详情 详情
(VIII) 24899 3-(3-chloropropyl)-7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one C15H18ClNO3 详情 详情
(IX) 24901 3-[3-[(3,4-dimethoxyphenethyl)(methyl)amino]propyl]-7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one C26H34N2O5 详情 详情

合成路线2

该中间体在本合成路线中的序号:(IV)

The condensation of 3,4-dimethoxyphenyacetic acid (I) with 2-aminoacetaldehyde diethylacetal (II) by means of 1,1'-carbonyldiimidazole (CDI) in CHCl3 gives N-(2,2-diethoxyethyl)-3,4-dimelhoxyphenylacetamide (III), which is cyclized by means of 48% aqueous HBr yielding 1,3-dihydro-7,8-dimethoxy-2H-3-benzazepin-2-one (IV). The reaction of (IV) with triethyloxonium tetrafluoroborate (V) in methylene chloride affords 2-ethoxy-7,8-dimethoxy-1H-3-benzazepine (VI), which is finally treated with ammonium chloride in refluxing methanol.

1 Paget, C.J. Jr.; Ruffolo, R.R. Jr. (Eli Lilly and Company); Benzazepine derivs.. EP 0116444; ES 8602681; ES 8801215; GB 2134519 .
2 Prous, J.; Castaner, J.; LY-127210. Drugs Fut 1986, 11, 9, 748.
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) 24049 2-(3,4-dimethoxyphenyl)acetic acid 93-40-3 C10H12O4 详情 详情
(II) 10331 2,2-Diethoxy-1-ethanamine; 2,2-Diethoxyethylamine; Aminoacetaldehyde diethyl acetal 645-36-3 C6H15NO2 详情 详情
(III) 24284 N-(2,2-diethoxyethyl)-2-(3,4-dimethoxyphenyl)acetamide C16H25NO5 详情 详情
(IV) 24285 7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one C12H13NO3 详情 详情
(VI) 24287 2-ethoxy-7,8-dimethoxy-1H-3-benzazepine C14H17NO3 详情 详情
Extended Information