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【结 构 式】

【分子编号】34723

【品名】3-(3-[(tert-butoxycarbonyl)[(tert-butoxycarbonyl)oxy]amino]-1-butynyl)-5-(4-chlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole

【CA登记号】

【 分 子 式 】C30H34ClN3O6

【 分 子 量 】568.06928

【元素组成】C 63.43% H 6.03% Cl 6.24% N 7.4% O 16.9%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XI)

Condensation of 4-chloroacetophenone (I) with ethyl diethoxyacetate (II) in the presence of lithium hexamethyldisilazide afforded diketoacetal (III). Formation of pyrazole (V) was accomplished by treatment of (III) with 4-methoxy-phenylhydrazine (IV). Subsequent acid hydrolysis of the diethyl acetal gave aldehyde (VI), which was condensed with carbon tetrabromide using triphenyl phosphine to furnish dibromoethylene compound (VII). Elimination of HBr in (VII) by treatment with tetrabutylammonium fluoride produced bromoacetylene (VIII). After lithium-bromine exchange, addition of acetaldehyde yielded the propargyl alcohol (IX). Further Mitsunobu coupling of (IX) with N,O-bis(tert-butoxycarbonyl)hydroxylamine (X) gave the N,O-bis-protected N-alkyl hydroxylamine (XI). After Boc deprotection of (XI) by means of trifluoroacetic acid, coupling with acetyl chloride provided the O-acetyl hydroxamic acid (XII). Finally, cleavage of the O-acyl group of (XII) with methanolic NaOH furnished the title compound.

1 Wetter, S.K.; Connolly, P.J.; Beers, K.N.; et al.; N-Hydroxyurea and hydroxamic acid inhibitors of cyclooxygenase and 5-lipoxygenase. Bioorg Med Chem Lett 1999, 9, 7, 979.
2 Chen, R.; Wachter, M.; Connolly, P. (Ortho-McNeil Pharmaceutical, Inc.); Acetylenic 1,5-diarylpyrazoles as antiinflammatory agents. US 5925769 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
11974 Acetaldehyde 75-07-0 C2H4O 详情 详情
19273 acetyl chloride 75-36-5 C2H3ClO 详情 详情
(I) 12685 4-Chloroacetophenone; 1-(4-Chlorophenyl)-1-ethanone; p-Chloroacetophenone 99-91-2 C8H7ClO 详情 详情
(II) 25674 ethyl 2,2-diethoxyacetate 6065-82-3 C8H16O4 详情 详情
(III) 34716 1-(4-chlorophenyl)-4,4-diethoxy-1,3-butanedione C14H17ClO4 详情 详情
(IV) 12688 4-Hydrazinophenyl methyl ether; 1-(4-Methoxyphenyl)hydrazine 3471-32-7 C7H10N2O 详情 详情
(V) 34717 4-[5-(4-chlorophenyl)-3-(diethoxymethyl)-1H-pyrazol-1-yl]phenyl methyl ether; 5-(4-chlorophenyl)-3-(diethoxymethyl)-1-(4-methoxyphenyl)-1H-pyrazole C21H23ClN2O3 详情 详情
(VI) 34718 5-(4-chlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carbaldehyde C17H13ClN2O2 详情 详情
(VII) 34719 4-[5-(4-chlorophenyl)-3-(2,2-dibromovinyl)-1H-pyrazol-1-yl]phenyl methyl ether; 5-(4-chlorophenyl)-3-(2,2-dibromovinyl)-1-(4-methoxyphenyl)-1H-pyrazole C18H13Br2ClN2O 详情 详情
(VIII) 34720 3-(2-bromoethynyl)-5-(4-chlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole; 4-[3-(2-bromoethynyl)-5-(4-chlorophenyl)-1H-pyrazol-1-yl]phenyl methyl ether C18H12BrClN2O 详情 详情
(IX) 34721 4-[5-(4-chlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazol-3-yl]-3-butyn-2-ol C20H17ClN2O2 详情 详情
(X) 34722 2-[([[(tert-butoxycarbonyl)amino]oxy]carbonyl)oxy]-2-methylpropane C10H19NO5 详情 详情
(XI) 34723 3-(3-[(tert-butoxycarbonyl)[(tert-butoxycarbonyl)oxy]amino]-1-butynyl)-5-(4-chlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole C30H34ClN3O6 详情 详情
(XII) 34724 1-((acetoxy)[3-[5-(4-chlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazol-3-yl]-1-methyl-2-propynyl]amino)-1-ethanone C24H22ClN3O4 详情 详情
Extended Information