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【结 构 式】

【分子编号】69474

【品名】ethyl 4-ethoxy-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate

【CA登记号】

【 分 子 式 】C12H15N3O3

【 分 子 量 】249.26952

【元素组成】 C 57.82% H 6.07% N 16.86% O 19.26%

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:(XVI)

The intermediates indolyloxy pyrrolotriazines (I) and (VII) can be prepared as follows. Cyclization of 2-oxobutyric acid (IX) with formamidine hydrochloride and hydrazine hydrate in the presence of AcOH in refluxing EtOH yields 6-ethyl-1,2,4-triazin-5-one (X). Subsequent condensation of triazinone (X) with 3-bromopyruvic acid (XI) in aqueous solution at 90 °C gives the pyrrolotriazine carboxylic acid (XII), which is esterified with refluxing EtOH/HCl to furnish ester (XIII) . Chlorination of hydroxypyrrolotriazine (XIII) with POCl3, optionally in the presence of DIEA, in refluxing toluene affords the 4-chloro derivative (XIV) , which is condensed with 4-fluoro-5-hydroxy-2-methylindole (XV) by means of K2CO3 in DMF to yield the indolyloxypyrrolotriazine adduct (VII) . Alternatively, displacement of chlorine in compound (XIV) with ethanolic NaOEt yields the 4-ethoxy derivative (XVI). Then, addition of methylmagnesium bromide to the ester group of (XVI) in THF leads to the tertiary alcohol (XVII), which undergoes oxidative cleavage to 4-ethoxy-6-hydroxy-5-methylpyrrolo[2,1-f]-1,2,4-triazine (XVIII) by treatment with H2O2 and BF3·Et2O in CH2Cl2. After protection of the hydroxyl group of (XVIII) with benzyl bromide and K2CO3 in DMF, selective cleavage of the O-ethyl group in the resulting diether (XIXa) by means of HCl in hot ethanol provides 6-benzyloxy-4-hydroxy-5-methylpyrrolo[2,1-f]-1,2,4-triazine (XXI) . Similarly, the 4-phenoxy analogue (XX) is protected as the corresponding benzyl ether (XIXb), which undergoes O-phenyl group cleavage to (XXI) upon heating with HCl . Reaction of alcohol (XXI) with POCl3 in refluxing toluene provides the 4-chloro derivative (XXII), which is then coupled with 4-fluoro-5-hydroxy-2-methylindole (XV) by means of NaH in DMF to provide intermediate (I) .

1 Bhide, R.S., Cai, Z.W., Zhang, Y.Z. et al. Discovery and preclinical studies of (R)-1-(4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-5-methylpyrrolo[2,1-f][1,2,4]triazin-6-yloxy)propan-2-ol (BMS-540215), an in vivo active potent VEGFR-2 inhibitor. J Med Chem 2006, 49(7): 2143-6.
2 Cai, Z.-W., Qian, L., Bhide, R., Barbosa, A. (Bristol-Myers Squibb Co.).Novel inhibitors of kinases. EP 1434290, JP 2005538989, US 2004072832, US 6869952, WO 2004009784.
3 Cai, Z.W., Zhang, Y.Z., Borzilleri, R.M. et al. Discovery of brivanib alaninate ((S)-((R)-1-(4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-5-methylpyrrolo[2,1-f][1,2,4]triazin-6-yloxy)propan-2-yl) 2-aminopropanoate), a novel prodrug of dual vascular endothelial growth factor receptor-2 and fibroblast growth factor receptor-1 kinase inhibitor (BMS-540215). J Med Chem 2008, 51(6):1976-80.
4 Chen, B.-C., Zhao, R., Sundeen, J.E., Leftheris, K., Hynes, J., Wrobleski,S.T. (Bristol-Myers Squibb Co.). Process for preparing pyrrolotriazine kinase inhibitors. JP 2006516653, US 2004157846, WO 2004072030.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XIXa) 69477 6-(benzyloxy)-4-ethoxy-5-methylpyrrolo[2,1-f][1,2,4]triazine C16H17N3O2 详情 详情
(XIXb) 69478 6-(benzyloxy)-5-methyl-4-phenoxypyrrolo[2,1-f][1,2,4]triazine C20H17N3O2 详情 详情
(I) 69463 6-(benzyloxy)-4-((4-fluoro-2-methyl-1H-indol-5-yl)oxy)-5-methylpyrrolo[2,1-f][1,2,4]triazine C23H19FN4O2 详情 详情
(VII) 69467 ethyl 4-((4-fluoro-2-methyl-1H-indol-5-yl)oxy)-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate C19H17FN4O3 详情 详情
(IX) 48297 2-oxobutyric acid 600-18-0 C4H6O3 详情 详情
(X) 69469 6-ethyl-1,2,4-triazin-5(4H)-one C5H7N3O 详情 详情
(XI) 69470 3-bromopyruvic acid;Bromopyruvic acid 1113-59-3 C3H3BrO3 详情 详情
(XII) 69471 4-hydroxy-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylic acid C8H7N3O3 详情 详情
(XIII) 69472 ethyl 4-hydroxy-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate C10H11N3O3 详情 详情
(XIV) 69473 4-Chloro-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylicacid ethyl ester;ethyl 4-chloro-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate 427878-41-9 C10H10ClN3O2 详情 详情
(XV) 65374 4-fluoro-5-hydroxy-2-methylindole; 2-Methyl-4-fluoro-5-hydroxyindole; 4-Fluoro-5-hydroxy-2-methyl-1H-indole 288385-88-6 C9H8FNO 详情 详情
(XVI) 69474 ethyl 4-ethoxy-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate C12H15N3O3 详情 详情
(XVII) 69475 2-(4-ethoxy-5-methylpyrrolo[2,1-f][1,2,4]triazin-6-yl)propan-2-ol C12H17N3O2 详情 详情
(XVIII) 69476 4-ethoxy-6-hydroxy-5-methylpyrrolo[2,1-f]-1,2,4-triazine;4-ethoxy-5-methylpyrrolo[2,1-f][1,2,4]triazin-6-ol C9H11N3O2 详情 详情
(XX) 69479 5-methyl-4-phenoxypyrrolo[2,1-f][1,2,4]triazin-6-ol C13H11N3O2 详情 详情
(XXI) 69480 6-(benzyloxy)-5-methylpyrrolo[2,1-f][1,2,4]triazin-4-ol;6-benzyloxy-4-hydroxy-5-methylpyrrolo[2,1-f]-1,2,4-triazine C14H13N3O2 详情 详情
(XXII) 69481 6-(benzyloxy)-4-chloro-5-methylpyrrolo[2,1-f][1,2,4]triazine C14H12ClN3O 详情 详情
Extended Information