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【结 构 式】

【分子编号】60734

【品名】ethyl 2-[4-(benzylamino)phenyl]propanoate

【CA登记号】

【 分 子 式 】C18H21NO2

【 分 子 量 】283.37028

【元素组成】C 76.3% H 7.47% N 4.94% O 11.29%

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:(II)

It can be obtained in two different ways, both starting from ethyl alpha-(4-aminophenyl)propionate (I): 1) The condensation of the amino compound (I) with benzaldehyde (A), followed by reduction of the Schiff base with H2 over Pt in ethanol gives ethyl alpha-(benzylaminophenyl)propionate (II), which by reaction with phosgene in toluene affords ethyl alpha-[N-chlorocarbonyl-(4-benzylaminophenyl)]propionate (III); the cyclization of this compound with AlCl3 in CH2Cl2 yields ethyl alpha-[4-(1-oxo-2-iso-indolinyl)phenyl]propionate (IV), which is finally saponified with K2CO3 in ethanol - water. 2) The cyclization of the amino compound (I) with 2-cyanobenzyl bromide (B) in refluxing ethanol affords ethyl alpha-[4-(1-imino-2-iso-indolinyl)phenyl]propionate (V). which is finally hydrolyzed and saponified with K2CO3 as before. The starting aminoester (I) is obtained as follows: The nitration of alpha-phenylpropionitrile (VI) gives alpha-(4-nitrophenyl)propionitrile (VII), which is hydrolyzed with H2SO4 to alpha-(4-nitrophenyl)propionic acid (VIII). Esterification of this acid with ethanol and H2SO4 yields ethyl alpha-(4-nitrophenyl)propionate (IX), which is finally reduced with H2 over Pd/C in ethanol giving the aminoester (I), b.p.(0.5mm) 125 C.

1 Castaner, J.; Arrigoni, Martelli, E.; Indoprofen. Drugs Fut 1976, 1, 5, 242.
2 Nanini, G.; et al.; New analgesic-anti-inflammatory drugs. 1-oxo-2-substituted isoindoline derivatives. Arzneim-Forsch 1973, 23, Suppl. 3, 1090.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(A) 10498 Benzaldehyde;Benzoic aldehyde;Phenylmethanal 100-52-7 C7H6O 详情 详情
(B) 33303 2-(bromomethyl)benzonitrile 22115-41-9 C8H6BrN 详情 详情
(I) 33984 ethyl 2-(4-aminophenyl)propanoate C11H15NO2 详情 详情
(II) 60734 ethyl 2-[4-(benzylamino)phenyl]propanoate C18H21NO2 详情 详情
(III) 60737 ethyl 2-{4-[benzyl(chlorocarbonyl)amino]phenyl}propanoate C19H20ClNO3 详情 详情
(IV) 60738 ethyl 2-[4-(1-oxo-1,3-dihydro-2H-isoindol-2-yl)phenyl]propanoate C19H19NO3 详情 详情
(V) 60739 ethyl 2-[4-(1-imino-1,3-dihydro-2H-isoindol-2-yl)phenyl]propanoate C19H20N2O2 详情 详情
(VI) 60735 hydratroponitrile C9H9N 详情 详情
(VII) 60736 2-(4-nitrophenyl)propanenitrile C9H8N2O2 详情 详情
(VIII) 52520 2-(4-nitrophenyl)propanoic acid C9H9NO4 详情 详情
(IX) 33983 ethyl 2-(4-nitrophenyl)propanoate C11H13NO4 详情 详情
Extended Information