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【结 构 式】

【分子编号】38948

【品名】4-fluoro-2-(trifluoromethyl)benzoyl chloride

【CA登记号】

【 分 子 式 】C8H3ClF4O

【 分 子 量 】226.5575328

【元素组成】C 42.41% H 1.33% Cl 15.65% F 33.54% O 7.06%

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:(VI)

Condensation between 1,2-phenylenediamine (I) and 2-chloronicotinic acid (II) in refluxing cyclohexanol generated the tricyclic system (III). Reduction of keto group of (III) with borane-dimethyl sulfide complex afforded 6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepine (IV). Acid chloride (VI), prepared from 4-fluoro-2-(trifluoromethyl)benzoic acid (V), was then condensed with tricyclic amine (IV) to produce amide (VII). Finally, displamecement of the 4-fluoro group of (VII) by the sodium salt of 3-methylpyrazole (VIII) in hot DMF yielded a 5:1 mixture of the title 3-methylpyrazole derivative and its 5-methyl regioisomer (IX), which were separated by column chromatography.

1 Failli, A.A.; Steffan, R.J.; Sumsky, J.S.; et al.; Pyridobenzodiazepines: Synthesis and structure-activity relationship of a novel class of orally active vasopressin V2 receptor agonists. 219th ACS Natl Meet (March 26 2000, San Francisco) 2000, Abst MEDI 201.
2 Failli, A.A.; Shumsky, J.S.; Steffan, R.J. (American Home Products Corp.); Tricyclic vasopressin agonists. EP 1000059; WO 9906403 .
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) 12824 2-Aminophenylamine; o-Phenylenediamine; 1,2-Benzenediamine 95-54-5 C6H8N2 详情 详情
(II) 28824 2-Chloropyridine-3-carboxylic acid; 2-Chloronicotinic acid 2942-59-8 C6H4ClNO2 详情 详情
(III) 38946 6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepin-5-one C12H9N3O 详情 详情
(IV) 38947 6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepine C12H11N3 详情 详情
(V) 38951 4-fluoro-2-(trifluoromethyl)benzoic acid 141179-72-8 C8H4F4O2 详情 详情
(VI) 38948 4-fluoro-2-(trifluoromethyl)benzoyl chloride C8H3ClF4O 详情 详情
(VII) 38949 5,11-dihydro-6H-pyrido[2,3-b][1,5]benzodiazepin-6-yl[4-fluoro-2-(trifluoromethyl)phenyl]methanone C20H13F4N3O 详情 详情
(VIII) 37998 3-methyl-1H-pyrazole 1453-58-3 C4H6N2 详情 详情
(IX) 38950 5,11-dihydro-6H-pyrido[2,3-b][1,5]benzodiazepin-6-yl[4-(5-methyl-1H-pyrazol-1-yl)-2-(trifluoromethyl)phenyl]methanone C24H18F3N5O 详情 详情

合成路线2

该中间体在本合成路线中的序号:(VI)

In a modified procedure, 4-fluoro-2-(trifluoromethyl)benzoic acid (V) was converted to acid chloride (VI) and then esterified with methanol to give methyl ester (X). Condensation of (X) with 3-methylpyrazole (VIII) produced a mixture of regioisomeric pyrazoles (XI) and (XII) from which the major 3-methyl isomer (XI) could be isolated by either flash chromatography or by recrystallization from EtOAc-hexane. Basic hydrolysis of the methyl ester of (XI) gave acid (XIII), which was finally coupled with tricyclic amine (IV) via activation as the mixed anhydride with 2,4,6-trichlorobenzoic acid.

1 Failli, A.A.; Steffan, R.J.; Sumsky, J.S.; et al.; Pyridobenzodiazepines: Synthesis and structure-activity relationship of a novel class of orally active vasopressin V2 receptor agonists. 219th ACS Natl Meet (March 26 2000, San Francisco) 2000, Abst MEDI 201.
2 Failli, A.A.; Shumsky, J.S.; Steffan, R.J. (American Home Products Corp.); Tricyclic vasopressin agonists. EP 1000059; WO 9906403 .
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) 38947 6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepine C12H11N3 详情 详情
(V) 38951 4-fluoro-2-(trifluoromethyl)benzoic acid 141179-72-8 C8H4F4O2 详情 详情
(VI) 38948 4-fluoro-2-(trifluoromethyl)benzoyl chloride C8H3ClF4O 详情 详情
(VIII) 37998 3-methyl-1H-pyrazole 1453-58-3 C4H6N2 详情 详情
(X) 38952 methyl 4-fluoro-2-(trifluoromethyl)benzoate C9H6F4O2 详情 详情
(XI) 38953 methyl 4-(3-methyl-1H-pyrazol-1-yl)-2-(trifluoromethyl)benzoate C13H11F3N2O2 详情 详情
(XII) 38954 methyl 4-(5-methyl-1H-pyrazol-1-yl)-2-(trifluoromethyl)benzoate C13H11F3N2O2 详情 详情
(XIII) 38955 4-(3-methyl-1H-pyrazol-1-yl)-2-(trifluoromethyl)benzoic acid C12H9F3N2O2 详情 详情
Extended Information