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【结 构 式】

【分子编号】33319

【品名】3-nitro-5-(4-pyridinyl)-2(1H)-pyridinone

【CA登记号】

【 分 子 式 】C10H7N3O3

【 分 子 量 】217.184

【元素组成】C 55.3% H 3.25% N 19.35% O 22.1%

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:(VII)

Compound can be prepared in several different ways: 1) The condensation of 2-(4-pyridinyl)-3-dimethylaminoacrolein (I) with cyanacetamide (II) by means of sodium methoxide in refluxing methanol gives 1,2-dihydro-5-(4-pyridinyl)-2-oxonicotinonitrile (III), which by hydrolysis with 90% H2SO4 at 100 C is converted into 1,2-dihydro-5-(4-pyridinyl)-2-oxonicotinamide (IV). Finally, this compound is submitted to a Hofmann degradation with Br2 and NaOH in water. 2) Compound (III) can also be obtained by condensation of 2-(4-pyridinyl)-malonodialdehyde (V) with cyanacetamide (II) by means of morpholine and acetic acid in refluxing benzene. 3) The hydrolysis of (III) with refluxing 50% H2SO4 gives 1,2-dihydro-5-(4-pyridinyl)-2-oxonicotinic acid (VI), which by reaction with 90% HNO3 in conc. H2SO4 at 80 C yields 3-nitro-5-(4-pyridinyl)-2(1H)-pyridinone (VII). Finally, this compound is reduced with H2 over Pd/C in DMF. 4) The decarboxylative hydrolysis of (III) with refluxing 80% H2SO4 gives 5-(4-pyridinyl)-2(1H)-pyridinone (VIII), which can be nitrated with conc. HNO3 in H2SO4 at 80 C to give also (VII).

1 Lesher, G.Y.; Opalka, C.J. (Sanofi-Synthelabo); 3-Cyano-5-(pyridinyl)-2(1H)-pyridinones. US 4004012; ZA 7606042 .
2 Hillier, K.; Amrinone. Drugs Fut 1979, 4, 4, 245.
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) 33314 (Z)-3-(dimethylamino)-2-(4-pyridinyl)-2-propenal C10H12N2O 详情 详情
(II) 12122 Cyanoacetamide; 2-Cyanoacetamide 107-91-5 C3H4N2O 详情 详情
(III) 33315 2-oxo-5-(4-pyridinyl)-1,2-dihydro-3-pyridinecarbonitrile C11H7N3O 详情 详情
(IV) 33316 2-oxo-5-(4-pyridinyl)-1,2-dihydro-3-pyridinecarboxamide C11H9N3O2 详情 详情
(V) 33317 2-(4-pyridinyl)malonaldehyde C8H7NO2 详情 详情
(VI) 33318 2-oxo-5-(4-pyridinyl)-1,2-dihydro-3-pyridinecarboxylic acid C11H8N2O3 详情 详情
(VII) 33319 3-nitro-5-(4-pyridinyl)-2(1H)-pyridinone C10H7N3O3 详情 详情
(VIII) 33320 5-(4-pyridinyl)-2(1H)-pyridinone C10H8N2O 详情 详情
Extended Information