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【结 构 式】

【分子编号】57891

【品名】phenyl (E)-3-[4-(aminocarbonyl)-1H-imidazol-5-yl]-1-methyl-2-triazene-1-carboxylate

【CA登记号】

【 分 子 式 】C12H12N6O3

【 分 子 量 】288.26592

【元素组成】C 50% H 4.2% N 29.15% O 16.65%

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:(IX)

Further nitration of the nitroimidazole (I) with HNO3, Ac2O gives the 1,4-dinitroimidazole (II), which is treated with KCN and NaHCO3 in methanol/water to yield 5-nitro-1H-imidazole-4-carbonitrile (III). The reaction of (III) with dihydropyran and Ts-OH in ethyl acetate affords the N-protected imidazole (IV). The reduction of (IV) with H2 over Pt/C in ethyl acetate provides the hydroxylamine (V), which is oxidized with NaIO4 in ethyl acetate/water to give the nitroso derivative (VI). The condensation of (VI) with phenyl 2-methylcarbazate (VII) by means of HOAc and TFA yields the triazene (VIII), which is treated with conc. HCL in ethyl acetate to afford the carboxamide (IX). Finally, this compound is cyclized to the target imidazo-tetrazinone by irradiation with daylight in acetone/MeOH, most probably through the non isolated cis intermediate (X).

1 Wanner, M.J.; Koomen, G.J.; A new synthesis of temozolomide. J Chem Soc - Perkins Trans I 2002, 16, 1877.
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) 57883 5-Nitroimidazole C3H3N3O2 详情 详情
(II) 57884 1,4-dinitro-1H-imidazole 19182-81-1 C3H2N4O4 详情 详情
(III) 57885 5-nitro-1H-imidazole-4-carbonitrile C4H2N4O2 详情 详情
(IV) 57886 5-nitro-1-tetrahydro-2H-pyran-2-yl-1H-imidazole-4-carbonitrile C9H10N4O3 详情 详情
(V) 57887 5-(hydroxyamino)-1-tetrahydro-2H-pyran-2-yl-1H-imidazole-4-carbonitrile C9H12N4O2 详情 详情
(VI) 57888 5-nitroso-1-tetrahydro-2H-pyran-2-yl-1H-imidazole-4-carbonitrile C9H10N4O2 详情 详情
(VII) 57889 phenyl 1-methyl-1-hydrazinecarboxylate C8H10N2O2 详情 详情
(VIII) 57890 phenyl (E)-3-(4-cyano-1H-imidazol-5-yl)-1-methyl-2-triazene-1-carboxylate C12H10N6O2 详情 详情
(IX) 57891 phenyl (E)-3-[4-(aminocarbonyl)-1H-imidazol-5-yl]-1-methyl-2-triazene-1-carboxylate C12H12N6O3 详情 详情
(X) 57892 phenyl (Z)-3-[4-(aminocarbonyl)-1H-imidazol-5-yl]-1-methyl-2-triazene-1-carboxylate C12H12N6O3 详情 详情
Extended Information