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【结 构 式】 
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【分子编号】67971 【品名】ethyl 3-ethoxy-3-iminopropionate hydrochloride 【CA登记号】2318-25-4 |
【 分 子 式 】C7H13NO3.HCl 【 分 子 量 】195.646 【元素组成】C 42.97% H 7.21% Cl 18.12% N 7.16% O 24.53% |
合成路线1
该中间体在本合成路线中的序号：(VI)Reaction of 2,4-difluoronitrobenzene (I) with liquid ammonia gives 5-fluoro-2-nitroaniline (IIa) , which by subsequent displacement of the remaining fluoride group with N-methylpiperazine (III) in the presence of Et3N in NMP at 100 °C provides the piperazinyl aniline (IV) . Alternatively, nitroaniline (IV) can be prepared by condensation of 5-chloro-2-nitroaniline (IIb) with N-methylpiperazine (III) in hot EtOH , ethylene glycol or aqueous NaCl, optionally in the presence of NaOH . Catalytic hydrogenation of nitroaniline (IV) over Pd/C in EtOH at 40-45 °C yields the phenyldiamine (V) , wh ich by condensa t ion with ethyl 3-ethoxy-3-iminopropionate hydrochloride (VI) at reflux produces benzimidazole (VII) . Cyclocondensation of ethyl ester (VII) with 2-amino-6-fluorobenzonitrile (VIII) by means of LiHMDS , KHMDS or t-BuOK in THF or toluene furnishes dovitinib (IX ) , which is finally treated with racemic lactic acid in EtOH/H2O .
| 【1】 Machajewski, T., Shafer, C., McCrea, B. et al. (Novartis Vaccines and Diagnostics, Inc.). Quinolone derivatives. EP 1317442, EP 1650203, EP 1849782, JP 2004509112, US 2002107392, US 6605617, WO 2002022598. |
| 【2】 Harrison, S.D., Shafer, C.M., Pecchi, S. et al. (Novartis Vaccines and Diagnostics, Inc.). Benzimidazole quinolines and uses thereof. EP 1539754, JP 2006503919, JP 2011162563, US 200409235, US 2013018058, WO 2004018419. |
| 【3】 Renhowe, P.A., Pecchi, S., Machajewski, T.D. (Novartis Vaccines and Diagnostics, Inc.). Quinolone derivatives. JP 2005527587, US 2003028018, WO 2003087095. |
| 【4】 Cai, S., Chou, J., Harwood, E., Machajewski, T.D., Ryckman, D., Shang, X., Zhu, S. (Novartis Vaccines and Diagnostics, Inc.). Pharmaceutically acceptable salts of quinolinone compounds having improved pharmaceutical properties. CN 102225926, EP 1699421, JP 2007522098, JP 2011042687, WO 2005046589. |
| 【5】 Renhowe, P.A., Pecchi, S., Shafer, C.M. et al. Design, structure-activity relationships and in vivo characterization of 4-amino-3-benzimidazol-2-ylhydroquinolin-2-ones: A novel class of receptor tyrosine kinase inhibitors. J Med Chem 2009, 52(2): 278-92. |
| 【6】 Calvin, G., Harwood, E., Ryckman, D., Zhu, S. (Novartis AG). Methods for synthesizing heterocyclic compounds. EP 1888556, EP 2465857, JP 2008540675, US 2011046376, US 8222413, WO 2006125130. |
| 【7】 Okhamafe, A., Chou, J., Gullapalli, R., Harwood, E., Ryckman, D., Zhu, S.,Shang, X. (Novartis Corp.). Crystalline and other forms of 4-amino-5-fluoro-3-[6-(4-methylpiperazin-1-yl)-1H-benzimidazol-2-yl]-1H-quinolin-2-one lactic acid salts. CN 102070614, EP 1904480, EP 2266974, EP 2270000, JP 200854289, US 2011178097, US 2012208825, WO 2006127926. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (IIa) | 67969 | 5-fluoro-2-nitroaniline | 2369-11-1 | C6H5FN2O2 | 详情 | 详情 |
| (IIb) | 15709 | 5-chloro-2-nitrophenylamine; 5-chloro-2-nitroaniline | 1635-61-6 | C6H5ClN2O2 | 详情 | 详情 |
| (I) | 32036 | 2,4-difluoro-1-nitrobenzene | 446-35-5 | C6H3F2NO2 | 详情 | 详情 |
| (III) | 10061 | 1-Methylpiperazine; 1-Methyl piperazine; N-Methylpiperazine | 109-01-3 | C5H12N2 | 详情 | 详情 |
| (IV) | 67970 | 5-(4-methylpiperazin-1-yl)-2-nitroaniline | C11H16N4O2 | 详情 | 详情 | |
| (V) | 31430 | 2-amino-4-(4-methyl-1-piperazinyl)phenylamine; 4-(4-methyl-1-piperazinyl)-1,2-benzenediamine | 54998-08-2 | C11H18N4 | 详情 | 详情 |
| (VI) | 67971 | ethyl 3-ethoxy-3-iminopropionate hydrochloride | 2318-25-4 | C7H13NO3.HCl | 详情 | 详情 |
| (VII) | 67972 | ethyl 2-(6-(4-methylpiperazin-1-yl)-1H-benzo[d]imidazol-2-yl)acetate | C16H22N4O2 | 详情 | 详情 | |
| (VIII) | 13857 | 5-Amino-2-fluorobenzonitrile; 2-Amino-6-fluorobenzonitrile | 77326-36-4 | C7H5FN2 | 详情 | 详情 |
| (IX) | 67973 | 4-amino-5-fluoro-3-(6-(4-methylpiperazin-1-yl)-1H-benzo[d]imidazol-2-yl)quinolin-2(1H)-one | 405169-16-6 | C21H21FN6O | 详情 | 详情 |