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

【结 构 式】

【分子编号】65726

【品名】 

【CA登记号】 

【 分 子 式 】C16H11FN2O3

【 分 子 量 】298.2734232

【元素组成】C 64.43% H 3.72% F 6.37% N 9.39% O 16.09%

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:(V)

3-Cyanobenzoic acid (Ia) is condensed with NH2OH in t-BuOH to yield oxime (IIa). Without isolation, compound (IIa) couples with 2-fluorobenzoyl chloride (III) in the presence of triethylamine to give oxime ester (IV), which is readily cyclized under reflux conditions (about 80 °C) (1).
Ataluren can also be obtained from its methyl ester precursor (V) by saponification with NaOH in t-BuOH/H2O (1) or THF/H2O (2) and subsequent acidification with H2SO4 (1) or HCl (2). Ataluren methyl ester (V) can be synthesized from methyl 3-cyanobenzoate (Ib) by subjecting it to either the same one-pot procedure as described above for 3-cyanobenzoic acid (Ia) (1) or, alternatively, to a similar non-one-pot procedure: condensation of (Ib) with NH2OH in EtOH at 100 ºC, coupling of the resulting oxime (IIb) with 2-fluorobenzoyl chloride (III) by means of DIEA in THF, and final cyclization of the isolated oxime ester (IVb) in toluene at 130 ºC (2). Methyl 3-cyanobenzoate (Ib) is prepared from the carboxylic acid (Ia) by methylation with CH3I in the presence of K2CO3 (2). Scheme 1.

1 Almstead, N.G., Hwang, P.S., Pines, S., Moon, Y.-C., Takasugi, J.J. (PTC Therapeutics, Inc.). Processes for the preparation of 1,2,4-oxadiazole benzoic acids. WO 2008030570.
2 Karp, G.M., Amstead, N.G., Chen, G., Hwang, S. (PTC Therapeutics, Inc.). 1,2,4-Oxadiazole benzoic acid compounds and their use for nonsense suppression and the treatment of disease. EP 1618098, JP 2006522286, US 2004204461, US 6992096, WO 2004091502.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IA) 20406 3-cyanobenzoic acid 1877-72-1 C8H5NO2 详情 详情
(IB) 65721 Methyl 3-cyanobenzoate 13531-48-1 C9H7NO2 详情 详情
(IIA) 65722     C8H8N2O3 详情 详情
(IIB) 65723     C9H10N2O3 详情 详情
(IVA) 65724     C15H11FN2O4 详情 详情
(IVB) 65725     C16H13FN2O4 详情 详情
(III) 19551 2-Fluorobenzoyl chloride 393-52-2 C7H4ClFO 详情 详情
(V) 65726     C16H11FN2O3 详情 详情
Extended Information