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【结 构 式】

【药物名称】SB-431542

【化学名称】4-[4-(1,3-Benzodioxol-5-yl)-5-(2-pyridyl)-1H-imidazol-2-yl]benzamide

【CA登记号】301836-41-9

【 分 子 式 】C22H16N4O3

【 分 子 量 】384.39782

【开发单位】GlaxoSmithKline (Originator)

【药理作用】Brain Cancer Therapy, Oncolytic Drugs, PHARMACOLOGICAL TOOLS, Transforming Growth Factor (TGF)-beta Receptor Type I Kinase (ALK5) Inhibitors

合成路线1

Reaction of piperonyloyl chloride (I) with N,O-dimethylhydroxylamine gives rise to the Weinreb amide (II). This is then condensed with the lithium anion of 2-picoline (III) to produce ketone (IV). Nitrosation of (IV) with NaNO2/HCl leads to keto oxime (V). Subsequent cyclization of (V) with p-formylbenzonitrile (VI) in the presence of ammonium acetate in AcOH affords the N-hydroxy imidazole (VII), which is further reduced to the triaryl imidazole (VIII) by means of triethyl phosphite in DMF. The cyano group of (VIII) is then hydrolyzed under acidic conditions to provide carboxylic acid (IX). After activation of (IX) as the corresponding acid chloride (X), treatment with ammonium hydroxide in THF yields the target carboxamide (1,2).

1 Callahan, J.F.; Burgess, J.L.; Fornwald, J.A.; Gaster, L.M.; Harling, J.D.; Harrington, F.P.; Heer, J.; Kwon, C.; Lehr, R.; Mathur, A.; Olson, B.A.; Weinstock, J.; Laping, N.J.; Identification of novel inhibitors of the transforming growth factor beta1 (TGF-beta1) type 1 receptor (ALK5). J Med Chem 2002, 45, 5, 999.
2 Callahan, J.F.; Burgess, J.L. (GlaxoSmithKline Inc.); Triarylimidazoles. EP 1169317; JP 2002541253; US 6465493; WO 0061576 .
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) 28821 1,3-benzodioxole-5-carbonyl chloride 20850-43-5 C8H5ClO3 详情 详情
(II) 64530 N-methoxy-N-methyl-1,3-benzodioxole-5-carboxamide C10H11NO4 详情 详情
(III) 17590 2-methylpyridine; 2-picoline 109-06-8 C6H7N 详情 详情
(IV) 64531 1-(1,3-benzodioxol-5-yl)-2-(2-pyridinyl)-1-ethanone C14H11NO3 详情 详情
(V) 64532 1-(1,3-benzodioxol-5-yl)-2-(2-pyridinyl)-1,2-ethanedione 2-oxime C14H10N2O4 详情 详情
(VI) 17552 4-formylbenzonitrile; 4-Cyanobenzaldehyde 105-07-7 C8H5NO 详情 详情
(VII) 64533 4-[4-(1,3-benzodioxol-5-yl)-1-hydroxy-5-(2-pyridinyl)-1H-imidazol-2-yl]benzonitrile C22H14N4O3 详情 详情
(VIII) 64534 4-[4-(1,3-benzodioxol-5-yl)-5-(2-pyridinyl)-1H-imidazol-2-yl]benzonitrile C22H14N4O2 详情 详情
(IX) 64535 4-[4-(1,3-benzodioxol-5-yl)-5-(2-pyridinyl)-1H-imidazol-2-yl]benzoic acid C22H15N3O4 详情 详情
(X) 64536 4-[4-(1,3-benzodioxol-5-yl)-5-(2-pyridinyl)-1H-imidazol-2-yl]benzoyl chloride C22H14ClN3O3 详情 详情
Extended Information