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【结 构 式】

【分子编号】54413

【品名】2-(1,3-dioxolan-2-yl)-3-nitropyridine

【CA登记号】

【 分 子 式 】C8H8N2O4

【 分 子 量 】196.1626

【元素组成】C 48.98% H 4.11% N 14.28% O 32.62%

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:(X)

The title compound has been obtained by several related ways: The reaction of 2-chloro-3-nitropyridine (I) with methylboronic acid by means of Pd(PPh3)4 and K2CO3 in hot dioxane gives 2-methyl-3-nitropyridine (III), which is condensed with dimethylformamide dimethylacetal (IV) to yield 2-[2-(dimethylamino)vinyl]-3-nitropyridine (V). The oxidation of (V) by means of NaIO4 affords 3-nitropyridine-2-carbaldehyde (VI), which is condensed with semicarbazide (VII) to provide the corresponding semicarbazone (VIII). Finally, the nitro group of (VIII) is reduced with SnCl2 or Na2S to furnish the target 3-aminopyridine-2-carbaldehyde semicarbazone. 2-Methyl-3-nitropyridine (III) can also be obtained by condensation of 2-chloro-3-nitropyridine (I) with diethyl malonate (II) by means of Na, followed by decarboxylative hydrolysis with H2SO4 at 125 C. The direct oxidation of 2-methyl-3-nitropyridine (III) with SeO2 in dioxane gives carbaldehyde (VI), which is treated with ethyleneglycol (IX) and Ts-OH to yield the cyclic acetal (X). The reduction of (X) with H2 over Pd/C in ethanol affords 3-aminopyridine-2-carbaldehyde ethylene ketal (XI), which is treated with semicarbazide (VI) and HCl to afford the target 3-aminopyridine-2-carbaldehyde semicarbazone. The condensation of 2-chloro-3-nitropyridine (I) with tributyl vinyl tin (XII) Pd(PPh3)4 and PPH3 in refluxing toluene gives 3-nitro-2-vinylpyridine (XIII), which is oxidized with O3 and Me2S in methanol to yield 3-nitropyridine-2-carbaldehyde (VI). This compound is condensed with semicarbazide (VII) and reduced to the target compound as already described.

1 Li, J.; et al.; Syntheses and antitumor activities of potent inhibitors of ribonucleotide reductase: 3-Amino-4-methylpyridine-2-carboxaldehyde-thiosemicarbazone (3-AMP), 3-amino-pyridine-2-carboxaldehyde-thiosemicarbazone (3-AP) and its water-soluble prodrugs. Curr Med Chem 2001, 8, 2, 121.
2 Niu, C.; et al.; Synthesis of 3-aminopyridine-2-carboxaldehyde thiosemicarbazone (3-AP). Tetrahedron 1998, 54, 23, 6311.
3 Liu, M-C.; et al.; Synthesis and antitumor activity of amino derivatives of pyridine-2-carboxaldehyde thiosemicarbazone. J Med Chem 1992, 35, 20, 3672.
4 Sartorelli, A.C.; Lin, T.-S. (Yale University); 2-Formylpyridine thiosemicarbazone derivs., their preparation and their use as antitumor agents. EP 0570294; JP 1994128230; US 5281715; US 5721259 .
5 Doyle, T.W.; Li, J.; Chen, S.-H.; Li, X.; Niu, C.-S. (Vion Pharmaceuticals, Inc.); Process for the synthesis of ribonucleotide reductase inhibitors 3-AP and 3-AMP. US 5869676; WO 9851670 .
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) 10321 2-Chloro-3-nitropyridine 5470-18-8 C5H3ClN2O2 详情 详情
(II) 16829 Diethyl malonate 105-53-3 C7H12O4 详情 详情
(III) 54410 2-methyl-3-nitropyridine 18699-87-1 C6H6N2O2 详情 详情
(IV) 11984 N-(Dimethoxymethyl)-N,N-dimethylamine;dimethylformamide dimethylacetal;1,1-dimethoxy-N,N-dimethylmethanamine; Dimethoxy-N,N-dimethylmethanamine; N,N-Dimethylformamide dimethyl acetal 4637-24-5 C5H13NO2 详情 详情
(V) 54411 (E)-N,N-dimethyl-2-(3-nitro-2-pyridinyl)-1-ethenamine; N,N-dimethyl-N-[(E)-2-(3-nitro-2-pyridinyl)ethenyl]amine C9H11N3O2 详情 详情
(VI) 54414 3-nitro-2-pyridinecarbaldehyde 10261-94-6 C6H4N2O3 详情 详情
(VII) 12954 1-Hydrazinecarbothioamide; Thiosemicarbazide 79-19-6 CH5N3S 详情 详情
(VIII) 54415 2-[(E)-(3-nitro-2-pyridinyl)methylidene]-1-hydrazinecarbothioamide C7H7N5O2S 详情 详情
(IX) 11295 Polyethylene glycol;1,2-Ethanediol;Monoethylene glycol; Ethylene glycol 107-21-1 C2H6O2 详情 详情
(X) 54413 2-(1,3-dioxolan-2-yl)-3-nitropyridine C8H8N2O4 详情 详情
(XI) 54412 2-(1,3-dioxolan-2-yl)-3-pyridinylamine; 2-(1,3-dioxolan-2-yl)-3-pyridinamine C8H10N2O2 详情 详情
(XII) 54417 3,3-dibutyl-1-heptene C15H30 详情 详情
(XIII) 54416 3-nitro-2-vinylpyridine C7H6N2O2 详情 详情
Extended Information