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【结 构 式】

【分子编号】69204

【品名】N-(2-ethoxy-4-nitrophenyl)acetamide

【CA登记号】 

【 分 子 式 】C10H12N2O4

【 分 子 量 】224.21636

【元素组成】C 53.57% H 5.39% N 12.49% O 28.54%

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:(XXII)

N-Protection of 2-amino-5-nitrophenol (XVII) with Ac2O in the presence of AcOH gives N-(2-hydroxy-4-nitrophenyl)acetamide (XXI), which upon O-alkylation with ethyl bromide (XX) in the presence of K2CO3 in DMF at 60 °C affords N-(2-ethoxy-4-nitrophenyl) acetamide (XXII). Reduction of the nitro derivative (XXII) with H2 over Pd/C in THF furnishes the corresponding aniline (XXIII), which by condensation with ethyl 2-cyano-3-ethoxy-2-propenoate (XXIV) at reflux produces enamine (XXV). Thermal cyclization of enamino ester (XXV) in Dowtherm at 250 °C then yields 4-hydroxyquinoline derivative (XXVI) , which upon chlorination with POCl3 in 1,2-diethoxyethane at 80-85 °C affords N-(4-chloro-3-cyano-7-ethoxyquinolin-6-yl)acetamide (VII) . Alternatively, condensation of ethyl cyanoacetate (II) with morpholine (XXVII) at 100-110 °C gives 4-(cyanoacetyl)morpholine (XXVIII), which after coupling with 4-acetamido-3-ethoxyaniline (XXIII) in the presence of triethyl orthoformate in i-PrOH at 50-60 °C produces the arylamino propenamide (XXIX). Finally, cyclization of (XXIX) in the presence of POCl3 in acetonitrile at 60-65 °C then leads to the target intermediate (VII) .

1 Wissner, A., Rabindran, S.K., Tsou, H.-R. (Wyeth). Substituted quinolines as protein tyrosine kinase enzyme inhibitors. EP 1670473, WO 2005034955.
2 Rabindran, S.K., Tsou, H.-R., Wissner, A. (Wyeth). Protein tyrosine kinase enzyme inhibitors. US 2005059678, US 7399865, WO 2005028443.
3 Bernier, C., Shaw, C.-C. (Wyeth). Method of preparing 4-halogenated quinoline intermediates. WO 2009139797.
4 Wang, Y., Warren, C. Papamichelakis, M. (Wyeth). Quinoline intermediates of receptor tyrosine kinase inhibitors and the synthesis thereof. WO 2005070890.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(II) 11877 Cyanoacetic acid ethyl ester; Ethyl 2-cyanoacetate; Ethyl cyanoacetate; Ethyl isocyanacetate 105-56-6 C5H7NO2 详情 详情
(VII) 69196 6-acetamido-4-chloro-7-ethoxyquinoline-3-carbonitrile;4-Chloro-3-cyano-7-ethoxy-6-(acetylamino)quinoline 848133-76-6 C14H12ClN3O2 详情 详情
(XVII) 33067 2-amino-5-nitrophenol 121-88-0 C6H6N2O3 详情 详情
(XX) 30344 1-bromoethane;ethyl bromide 74-96-4 C2H5Br 详情 详情
(XXI) 69203 N-(2-hydroxy-4-nitrophenyl)acetamide   C8H8N2O4 详情 详情
(XXII) 69204 N-(2-ethoxy-4-nitrophenyl)acetamide   C10H12N2O4 详情 详情
(XXIII) 69205 N-(4-amino-2-ethoxyphenyl)acetamide   C10H14N2O2 详情 详情
(XXIV) 43563 ethyl (E)-2-cyano-3-ethoxy-2-propenoate;(E)-ethyl 2-cyano-3-ethoxyacrylate 94-05-3 C8H11NO3 详情 详情
(XXV) 69206 (E)-ethyl 3-((4-acetamido-3-ethoxyphenyl)amino)-2-cyanoacrylate   C16H19N3O4 详情 详情
(XXVI) 69207 N-(3-cyano-7-ethoxy-4-hydroxyquinolin-6-yl)acetamide   C14H13N3O3 详情 详情
(XXVII) 10388 Morpholine 110-91-8 C4H9NO 详情 详情
(XXVIII) 69208 4-(cyanoacetyl)morpholine;Cyanoacetic acid morpholide;N-(Cyanoacetyl)morpholine;3-Morpholin-4-yl-3-oxopropionitrile;3-(4-Morpholinyl)-3-oxopropanenitrile;(Morpholinocarbonyl)acetonitrile;(Morpholin-4-ylcarbonyl)acetonitrile 15029-32-0 C7H10N2O2 详情 详情
(XXIX) 69209 (E)-N-(4-((2-cyano-3-morpholino-3-oxoprop-1-en-1-yl)amino)-2-ethoxyphenyl)acetamide   C18H22N4O4 详情 详情
Extended Information