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【结 构 式】

【分子编号】62513

【品名】4-methyl-5-nitro-1H-imidazole

【CA登记号】

【 分 子 式 】C4H5N3O2

【 分 子 量 】127.10272

【元素组成】C 37.8% H 3.97% N 33.06% O 25.18%

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)

4-Methyl-5-nitroimidazole (I) is condensed with benzaldehyde (II) in the presence of piperidine to produce the 4-styryl imidazole (III). Alkylation of imidazole (III) with benzyl chloride leads to a 3:1 mixture of regioisomeric N-benzyl imidazoles (IV) and (V). Ozonolysis of this mixture, followed by oxidative work-up of the ozonide with performic acid, allows isolation of the desired imidazolecarboxylic acid (VI) by employing a differential precipitation technique. Activation of acid (VI) with CDI, and further treatment of the resultant imidazolide with potassium methanenitronate gives rise to nitro ketone (VII). Both nitro groups of (VII) are then reduced by SnCl2 in concentrated HCl to furnish diamine (VIII). Then, removal of the N-benzyl group of (VIII) by catalytic hydrogenation over Pd/C yields imidazole (IX). Ring closure of (IX) in the presence of triethyl orthoformate produces the imidazodiazepinone (X)

1 Chan, E.; et al.; Total synthesis of (8R)-3-(2-deoxy-beta-D-erythro-pentofuranosyl)-3,6,7,8-tetrahydroimidazo[4,5-d][1,3]diazepin-8-ol (pentostatin), the potent inhibitor of adenosine deaminase. J Org Chem 1982, 47, 18, 3457.
2 Baker, D.C.; Putt, S.R.; A total synthesis of pentostatin, the potent inhibitor of adenosine deaminase. J Am Chem Soc 1979, 101, 20, 6127.
3 Baker, D.C.; Putt, S.R. (Pfizer Inc.); 2-Amino-1-(5-amino-1H-imidazol-4-yl)ethanone and method of preparation. DE 2835144; ES 472478; ES 479618; GB 2005661; GB 2013680; US 4117229 .
4 Baker, D.C.; Putt, S.R. (Pfizer Inc.); Imidazole cpds., methods for their production and conversion of said cpds. into (R)-3-(2-deoxy-beta-D-erythro-pentofuranosyl)-3,6,7,8-tetrahydroimidazol[4,5-d][1,3]diazepin-8-ol. US 4195176 .
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) 62513 4-methyl-5-nitro-1H-imidazole C4H5N3O2 详情 详情
(II) 10498 Benzaldehyde;Benzoic aldehyde;Phenylmethanal 100-52-7 C7H6O 详情 详情
(III) 62514 5-nitro-4-[(E)-2-phenylethenyl]-1H-imidazole C11H9N3O2 详情 详情
(IV) 62515 1-benzyl-4-nitro-5-[(E)-2-phenylethenyl]-1H-imidazole C18H15N3O2 详情 详情
(V) 62516 1-benzyl-5-nitro-4-[(E)-2-phenylethenyl]-1H-imidazole C18H15N3O2 详情 详情
(VI) 62517 1-benzyl-4-nitro-1H-imidazole-5-carboxylic acid C11H9N3O4 详情 详情
(VII) 62518 1-(1-benzyl-4-nitro-1H-imidazol-5-yl)-2-nitro-1-ethanone C12H10N4O5 详情 详情
(VIII) 62519 2-amino-1-(4-amino-1-benzyl-1H-imidazol-5-yl)-1-ethanone C12H14N4O 详情 详情
(IX) 62520 2-amino-1-(5-amino-1H-imidazol-4-yl)-1-ethanone C5H8N4O 详情 详情
(X) 40806 6,7-dihydroimidazo[4,5-d][1,3]diazepin-8(3H)-one C6H6N4O 详情 详情
Extended Information