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【结 构 式】

【分子编号】36330

【品名】diethyl 2-(2-nitrobenzylidene)malonate

【CA登记号】

【 分 子 式 】C14H15NO6

【 分 子 量 】293.27624

【元素组成】C 57.34% H 5.16% N 4.78% O 32.73%

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:(I)

Reductive ring closure of diethyl 2-nitrobenzylidenemalonate (I) afforded quinolone (II). Subsequent N-alkylation of (II) with isopropyl iodide gave (III). Carboxylic acid (IV) was then obtained by basic hydrolysis of the ethyl ester (III). In a related procedure, reductive alkylation of 2-aminobenzyl alcohol (V) with acetone in the presence of NaBH4 gave the N-isopropyl derivative (VI). Oxidation of (VI) using activated MnO2 in toluene yielded aldehyde (VII). Further Knoevenagel condensation of (VII) with diethyl malonate in the presence of piperidine and AcOH produced the previously described quinolone ester (III). Alternatively, condensation of (VII) with malonic acid directly produced the previously described quinolonecarboxylic acid (IV). Acid chloride (VIII) was then prepared by treatment of (IV) with thionyl chloride in hot toluene.

1 Yokomori, S.; Muramatsu, M.; Suzuki, M.; Ito, C.; Asanuma, H.; Isobe, Y.; Ohuchi, Y.; Kaneko, T.; Synthesis and evaluation of novel 2-oxo-1,2-dihydro-3-quinolinecarboxamide derivatives as potent and selective serotonin 5-HT4 receptor agonists. Chem Pharm Bull 2001, 49, 1, 29.
2 Ohuchi, Y.; Suzuki, M.; Asanuma, H.; Yokomori, S.; Hatayama, K. (Taisho Pharmaceutical Co., Ltd.); Quinolinecarboxylic acid deriv.. EP 0710662; JP 1996034784; US 5753673; WO 9531455 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
16829 Diethyl malonate 105-53-3 C7H12O4 详情 详情
(I) 36330 diethyl 2-(2-nitrobenzylidene)malonate C14H15NO6 详情 详情
(II) 36331 ethyl 2-oxo-1,2-dihydro-3-quinolinecarboxylate C12H11NO3 详情 详情
(III) 36332 ethyl 1-isopropyl-2-oxo-1,2-dihydro-3-quinolinecarboxylate C15H17NO3 详情 详情
(IV) 36333 1-isopropyl-2-oxo-1,2-dihydro-3-quinolinecarboxylic acid C13H13NO3 详情 详情
(V) 18619 (2-aminophenyl)methanol; 2-Amino-benzenemethanol;2-Hydroxymethyl aniline;2-aminobenzyl alcohol;o-Aminobenzyl 2-aminobenzylalcohol;alcohol; 2-aminobenzenemethanol; 2-aminobenzyl alcohol 5344-90-1 C7H9NO 详情 详情
(VI) 36334 [2-(isopropylamino)phenyl]methanol;2-(isopropylamino)benzyl alcohol;(2-(isopropylamino)phenyl)methanol C10H15NO 详情 详情
(VII) 36335 2-(isopropylamino)benzaldehyde C10H13NO 详情 详情
(VIII) 36336 1-isopropyl-2-oxo-1,2-dihydro-3-quinolinecarbonyl chloride C13H12ClNO2 详情 详情
Extended Information