• English
  • 简体中文
Login Register
Current Location: Home > Feedback Help Print

【结 构 式】

【分子编号】56536

【品名】2-(benzyloxy)-2-oxoethyl 2-[2-(2,6-dichloroanilino)phenyl]acetate

【CA登记号】

【 分 子 式 】C23H19Cl2NO4

【 分 子 量 】444.3136

【元素组成】C 62.18% H 4.31% Cl 15.96% N 3.15% O 14.4%

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:(III)

Alkylation of the sodium salt of diclofenac (I) with benzyl bromoacetate (II) in hot DMF yielded the (arylacetoxy)acetate (III). Subsequent hydrogenolysis of the benzyl ester of (III) in the presence of Pd/C gave the title carboxylic acid. Alternatively, the benzyl ester group of (III) was cleaved by means of the combination of chlorotrimethylsilane and sodium iodide. This method of selective ester hydrolysis with in situ generated iodotrimethylsilane was also applied to the corresponding methyl (IV) and tert-butyl (V) esters. In a related procedure, tert-butyl ester (V) was prepared by alkylation of diclofenac (VI) with tert-butyl bromoacetate (VII) in the presence of tertiary amines. Selective cleavage of the tert-butyl ester group of (V) was then performed by treatment with either trifluoroacetic or formic acid.

1 Casas, A.V. (Almirall Prodesfarma, SA); 2-[(2,6-Dichlorophenyl)amino]phenylacetoxyacetyl derivs. and therapeutic compsns. containing same. EP 0119932; US 4548952 .
2 Ginebreda Martí, A.; Agustí Cruz, A. (Almirall Prodesfarma, SA); Process for obtaining 2-[(2,6-dichlorophenyl)amino]phenylacetoxyacetic acid. ES 2020146 .
3 Schickaneder, H.; Nikolopoulos, A.; Murphy, T.; Process for the preparation of aceclofenac. WO 9955660 .
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) 56535 sodium 2-[2-(2,6-dichloroanilino)phenyl]acetate C14H10Cl2NNaO2 详情 详情
(II) 12869 benzyl 2-bromoacetate 5437-45-6 C9H9BrO2 详情 详情
(III) 56536 2-(benzyloxy)-2-oxoethyl 2-[2-(2,6-dichloroanilino)phenyl]acetate C23H19Cl2NO4 详情 详情
(IV) 56537 2-methoxy-2-oxoethyl 2-[2-(2,6-dichloroanilino)phenyl]acetate C17H15Cl2NO4 详情 详情
(V) 56538 2-(tert-butoxy)-2-oxoethyl 2-[2-(2,6-dichloroanilino)phenyl]acetate C20H21Cl2NO4 详情 详情
(VI) 33701 Diclofenac; 2-[2-(2,6-Dichloroanilino)phenyl]acetic acid C14H11Cl2NO2 详情 详情
(VII) 17430 2-Bromoacetic acid tert-butyl ester; tert-butyl 2-bromoacetate; tert-Butyl bromoacetate 5292-43-3 C6H11BrO2 详情 详情
Extended Information