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【结 构 式】

【分子编号】36624

【品名】bromo(4-chloro-3-methoxyphenyl)magnesium

【CA登记号】

【 分 子 式 】C7H6BrClMgO

【 分 子 量 】245.78574

【元素组成】C 34.21% H 2.46% Br 32.51% Cl 14.42% Mg 9.89% O 6.51%

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:(X)

The Grignard condensation of 1-tetralone (IX) with 4-chloro-3-methoxyphenylmagnesium bromide (X) in THF followed by a treatment with TsOH gives 4-(4-chloro-3-methoxyphenyl)-1,2-dihydronaphthalene (XI), which is oxidized with oxone and TsOH yielding the 2-tetralone (XII). The condensation of (XII) with 2-aminoacetaldehyde dimethylacetal (XIII) in toluene affords the enamine (XIV), which is reduced with BH3 / t-Bu-NH2 and AcOH in dichloromethane to give a 9:1 mixture of cis (XV) and trans (XVI) isomers that is epimerized with t-BuOK in DMSO/DMF to a 15:85 mixture from which the desired trans-diastereomer (XVI) is isolated. The cyclization of (XVI) with CH3SO3H in dichloromethane affords the tetracyclic compound (XVII), which is hydrogenated with BH3 / t-Bu-NH2 to provide the intermediate (XVIII). Finally, this compound is methylated with formaldehyde and formic acid to obtain the previously reported rac-(VIII) compound.

1 Berger, J.G.; Clader, J.W.; Chang, W.K.; Gold, E.H. (Schering Corp.); Fused benzazepines. EP 0230270; EP 0254737; JP 1988502348; WO 8704430 .
2 Draper, R.W.; et al.; Novel stereoselective syntheses of the fused benzazepine dopamine D1 antagonist (6aS,13bR)-11-chloro-6,6a,7,8,9,13b-hexahydro-7-methyl-5-H-benzo[d]naphth[2,1-b]azepin-12-ol (Sch 39166): 1. Aziridinium salt based syntheses. Org Process Res Dev 1998, 2, 3, 175.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VIII) 31779 (3aS,9bR)-12-chloro-11-methoxy-3-methyl-2,3,3a,4,5,9b-hexahydro-1H-naphtho[1,2-a][3]benzazepine; (3aS,9bR)-12-chloro-3-methyl-2,3,3a,4,5,9b-hexahydro-1H-naphtho[1,2-a][3]benzazepin-11-yl methyl ether C20H22ClNO 详情 详情
(IX) 20720 3,4-dihydro-1(2H)-naphthalenone 529-34-0 C10H10O 详情 详情
(X) 36624 bromo(4-chloro-3-methoxyphenyl)magnesium C7H6BrClMgO 详情 详情
(XI) 36625 4-(4-chloro-3-methoxyphenyl)-1,2-dihydronaphthalene; 2-chloro-5-(3,4-dihydro-1-naphthalenyl)phenyl methyl ether C17H15ClO 详情 详情
(XII) 36626 1-(4-chloro-3-methoxyphenyl)-3,4-dihydro-2(1H)-naphthalenone C17H15ClO2 详情 详情
(XIII) 34158 aminoacetaldehyde dimethylacetal; 2,2-dimethoxy-1-ethanamine; 2,2-dimethoxyethylamine 22483-09-6 C4H11NO2 详情 详情
(XIV) 36627 N-[1-(4-chloro-3-methoxyphenyl)-3,4-dihydro-2-naphthalenyl]-N-(2,2-dimethoxyethyl)amine; 1-(4-chloro-3-methoxyphenyl)-N-(2,2-dimethoxyethyl)-3,4-dihydro-2-naphthalenamine C21H24ClNO3 详情 详情
(XV) 36628 N-[(1R,2S)-1-(4-chloro-3-methoxyphenyl)-1,2,3,4-tetrahydro-2-naphthalenyl]-N-(2,2-dimethoxyethyl)amine; (1R,2S)-1-(4-chloro-3-methoxyphenyl)-N-(2,2-dimethoxyethyl)-1,2,3,4-tetrahydro-2-naphthalenamine C21H26ClNO3 详情 详情
(XVI) 36629 (1S,2S)-1-(4-chloro-3-methoxyphenyl)-N-(2,2-dimethoxyethyl)-1,2,3,4-tetrahydro-2-naphthalenamine; N-[(1S,2S)-1-(4-chloro-3-methoxyphenyl)-1,2,3,4-tetrahydro-2-naphthalenyl]-N-(2,2-dimethoxyethyl)amine C21H26ClNO3 详情 详情
(XVII) 36630 (3aS,9bR)-12-chloro-3a,4,5,9b-tetrahydro-3H-naphtho[1,2-a][3]benzazepin-11-yl methyl ether; (3aS,9bR)-12-chloro-11-methoxy-3a,4,5,9b-tetrahydro-3H-naphtho[1,2-a][3]benzazepine C19H18ClNO 详情 详情
(XVIII) 36631 (3aS,9bR)-12-chloro-2,3,3a,4,5,9b-hexahydro-1H-naphtho[1,2-a][3]benzazepin-11-yl methyl ether; (3aS,9bR)-12-chloro-11-methoxy-2,3,3a,4,5,9b-hexahydro-1H-naphtho[1,2-a][3]benzazepine C19H20ClNO 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XXXIVb)

The reaction of L-homophenylalanine (XXXIX) with methyl chloroformate, NaHCO3 and NaOH gives N-(methoxycarbonyl)-L-homophenylalanine (XXXI), which is treated with SOCl2 yielding the acyl chloride (XXXII). The cyclization of (XXXII) by means of AlCl3 in dichloromethane affords the chiral tetralone (XXXIII), which is condensed with the aryllithium (or arylmagnesium bromide) (XXXIV) to give the intermediate alcohol (XXXV). Elimination of the OH group of (XXXV) by means of Et3SiH and TFA yields the carbamate (XXXVI) as a 3.6:1 mixture of cis- and trans-isomers, which is reduced with LiAlH4 in refluxing THF providing the secondary amine (XXXVII). The alkylation of (XXXVII) with 2-bromoacetaldehyde dimethylacetal (XXV) by means of KF/Al2O3 in refluxing acetonitrile affords the tertiary amine (XXXVIII), also as a mixture of cis- and trans-isomers. The 1:3 trans/cis ratio of isomers in (XXXVIII) is improved up to 50:1 by treatment with t-BuOK in DMSO/DMF providing the desired trans(1R,2S)-isomer (XXVIII) already reported.

1 Draper, R.W.; et al.; Novel stereoselective syntheses of the fused benzazepine dopamine D1 antagonist (6aS,13bR)-11-chloro-6,6a,7,8,9,13b-hexahydro-7-methyl-5-H-benzo[d]naphth[2,1-b]azepin-12-ol (Sch 39166): 2. L-homophenylalanine-based syntheses. Org Process Res Dev 1998, 2, 3, 186.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
16993 methyl chlorocarbonate;Carbonochloridic acid methyl ester;[(chlorocarbonyl)oxy]methane;methyl chloroformate 79-22-1 C2H3ClO2 详情 详情
(XXXIVb) 36624 bromo(4-chloro-3-methoxyphenyl)magnesium C7H6BrClMgO 详情 详情
(XXXIVa) 36646 (4-chloro-3-methoxyphenyl)lithium C7H6ClLiO 详情 详情
(XXV) 13183 2-Bromo-1,1-dimethoxyethane; 2-Bromo-1-methoxyethyl methyl ether; Bromoacetaldehyde dimethyl acetal 7252-83-7 C4H9BrO2 详情 详情
(XXVIII) 63422 (2S)-1-(4-chloro-3-methoxyphenyl)-N-(2,2-dimethoxyethyl)-N-methyl-1,2,3,4-tetrahydro-2-naphthalenamine; N-[(2S)-1-(4-chloro-3-methoxyphenyl)-1,2,3,4-tetrahydro-2-naphthalenyl]-N-(2,2-dimethoxyethyl)-N-methylamine C22H28ClNO3 详情 详情
(XXXI) 36643 (2S)-2-[(methoxycarbonyl)amino]-4-phenylbutyric acid C12H15NO4 详情 详情
(XXXII) 36644 methyl (1S)-1-(chlorocarbonyl)-3-phenylpropylcarbamate C12H14ClNO3 详情 详情
(XXXIII) 36645 methyl (2S)-1-oxo-1,2,3,4-tetrahydro-2-naphthalenylcarbamate C12H13NO3 详情 详情
(XXXV) 36647 methyl (1R,2S)-1-(4-chloro-3-methoxyphenyl)-1-hydroxy-1,2,3,4-tetrahydro-2-naphthalenylcarbamate C19H20ClNO4 详情 详情
(XXXVI) 36648 methyl (2S)-1-(4-chloro-3-methoxyphenyl)-1,2,3,4-tetrahydro-2-naphthalenylcarbamate C19H20ClNO3 详情 详情
(XXXVII) 36649 (2S)-1-(4-chloro-3-methoxyphenyl)-N-methyl-1,2,3,4-tetrahydro-2-naphthalenamine; N-[(2S)-1-(4-chloro-3-methoxyphenyl)-1,2,3,4-tetrahydro-2-naphthalenyl]-N-methylamine C18H20ClNO 详情 详情
(XXXVIII) 36640 N-[(1S,2S)-1-(4-chloro-3-methoxyphenyl)-1,2,3,4-tetrahydro-2-naphthalenyl]-N-(2,2-dimethoxyethyl)-N-methylamine; (1S,2S)-1-(4-chloro-3-methoxyphenyl)-N-(2,2-dimethoxyethyl)-N-methyl-1,2,3,4-tetrahydro-2-naphthalenamine C22H28ClNO3 详情 详情
(XXXIX) 36642 (2S)-2-amino-4-phenylbutyric acid 943-73-7 C10H13NO2 详情 详情
Extended Information