|
【结 构 式】 
|
【分子编号】22953 【品名】5-(6-Methylpyridin-3-ylmethyl)-2-(nitroamino)pyrimidin-4(1H)-one 【CA登记号】 |
【 分 子 式 】C11H11N5O3 【 分 子 量 】261.24024 【元素组成】C 50.57% H 4.24% N 26.81% O 18.37% |
合成路线1
该中间体在本合成路线中的序号：(XIII)2-Chloro-3-nitropyridine (I) is condensed with diethyl 2-(2-cyanoethyl)malonate (II) by means of NaH in refluxing THF fo give 1-cyano-3,3-bis(ethoxycarbonyl)-3-(3-nitro-2-pyridinyl)propane (III), which is hydrolyzed with NaOH io aqueous ethanol and decarboxylated in aqueous HCl to afford 2-(3-cyanopropyl)-3-nitropyridine (IV). Hydrogenation of (IV) over Pd/C in ethanol gives 3 amino-2-(3-cyanopropyl)pyridine (V), which is diazotized with NaNO2 in dilute H2SO4 and hydrolyzed to 2-(3-cyanopropyl)-3-hydroxypyridine (VI). Methylation of (VI) with MeI by means of NaH in Me2SO yields 2-(3-cyanopropyl)-3-methoxypyridine (VII), which is then reduced with LiAlH4 to provide 2-(4-amino-butyl)-3-methoxypyridine (VIII). The final stage is to condense (VIII) with 2-nitroamino-5-(6-methyl)-3-pyridinylmethyl)-4-pyrimidinone (XIII) in refluxing pyridine. Synthesis of the pyrimidinone (XIII) reagent commences with 2-methylpyridine-4-aldehyde (IX), which is condensed with malonic acid and decarboxylated in pyridine containing piperidine to afford 3-(6-methyl-3pyridinyl)acrylic acid (X). Esterification of (X) with ethanol-H2SO4, followed by reduction with H2 over Pd/C in ethanol gives ethyl (2-mcthyl-5-pyridinyl)ethanoate (XI), which with ethyl formate in the presence of NaH in glyme furnishes 1-(ethoxycarbonyl)-1-formyl-2-(2 methyl-5-pyridinyl)ethane (XII). Condensation of (XII) with nitroguanidine in ethanol in the presence of NaOEt provides the 4-pyrimidinone (XIII).
| 【1】 Durant, G.J.; Ganellin, C.R.; Sach, G.S. (SmithKline Beecham plc); Guanidines, thioureas and 1,1-diamino-2-nitroethyl. GB 1564502; US 4426526 . |
| 【2】 Durant, G.J.; Brown, T.H.; Ganellin, C.R. (SmithKline Beecham plc); Pyridylalkylpyrimidone cpds., process for preparin. EP 0017679 . |
| 【3】 Prous, J.; Castaner, J.; Icotidine trihydrochloride. Drugs Fut 1987, 12, 1, 24. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (A) | 12963 | Malonic acid | 141-82-2 | C3H4O4 | 详情 | 详情 |
| (I) | 10321 | 2-Chloro-3-nitropyridine | 5470-18-8 | C5H3ClN2O2 | 详情 | 详情 |
| (II) | 22941 | diethyl 2-(2-cyanoethyl)malonate | 17216-62-5 | C10H15NO4 | 详情 | 详情 |
| (III) | 22942 | diethyl 2-(2-cyanoethyl)-2-(3-nitro-2-pyridinyl)malonate | C15H17N3O6 | 详情 | 详情 | |
| (IV) | 22943 | 4-(3-nitro-2-pyridinyl)butanenitrile | C9H9N3O2 | 详情 | 详情 | |
| (V) | 22944 | 4-(3-amino-2-pyridinyl)butanenitrile | C9H11N3 | 详情 | 详情 | |
| (VI) | 22945 | 4-(3-hydroxy-2-pyridinyl)butanenitrile | C9H10N2O | 详情 | 详情 | |
| (VII) | 22946 | 4-(3-methoxy-2-pyridinyl)butanenitrile | C10H12N2O | 详情 | 详情 | |
| (VIII) | 22947 | 4-(3-methoxy-2-pyridinyl)-1-butanamine; 4-(3-methoxy-2-pyridinyl)butylamine | C10H16N2O | 详情 | 详情 | |
| (IX) | 22949 | 6-methylnicotinaldehyde | C7H7NO | 详情 | 详情 | |
| (X) | 22950 | (E)-3-(6-methyl-3-pyridinyl)-2-propenoic acid | C9H9NO2 | 详情 | 详情 | |
| (XI) | 22951 | ethyl 3-(6-methyl-3-pyridinyl)propanoate | C11H15NO2 | 详情 | 详情 | |
| (XII) | 22952 | ethyl 2-formyl-3-(6-methyl-3-pyridinyl)propanoate | C12H15NO3 | 详情 | 详情 | |
| (XIII) | 22953 | 5-(6-Methylpyridin-3-ylmethyl)-2-(nitroamino)pyrimidin-4(1H)-one | C11H11N5O3 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(VIII)The condensation of diethyl 2-(2-cyanoethyl)malonate (I) with 2-chloro-3-methyl-5-nitropyridine (II) by means of NaH in refluxing THF gives 4-(3-methyl-5-nitropyrid-2-yl)-4,4-bis(ethoxycarbonyl)butyronitrile (III), which is decarboxylated with NaOH in ethanol water yielding 4-(3-methyl-5-nitropyrid-2-yl)butyronitrile (IV). The reduction of (IV) with H2 over Pd/C in ethanol affords 4-(5-amino-3-methylpyrid-2-yl)butyronitrile (V), which is reduced further with LiAlH4 in ether-THF giving 5-amino-2-(4-aminobutyl)-3-methylpyridine (VI). The Sandmeyer reaction of (VI) with NaNO2, HBr and Cu2Br2 yields 5-bromo-2-(4-aminobutyl)-3-methylpyridine (VII), which is finally condensed with 2-nitroamino-5-(6-methylpyrid-2-ylmethyl)-4-pyrimidone (VIII) in refluxing pyridine.
| 【1】 Sach, G.S. (SmithKline Beecham plc); Histamine H1-antagonists. DD 202291; EP 0068833; EP 0068834; JP 58008079; JP 61233616; JP 61233670; US 4444772; US 4486434; US 4535163; US 4584381 . |
| 【2】 Serradell, M.N.; Castaner, J.; SKF-93944. Drugs Fut 1985, 10, 3, 209. |
| 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) | 22941 | diethyl 2-(2-cyanoethyl)malonate | 17216-62-5 | C10H15NO4 | 详情 | 详情 |
| (II) | 29072 | 2-chloro-3-methyl-5-nitropyridine | C6H5ClN2O2 | 详情 | 详情 | |
| (III) | 29073 | Diethyl 2-(2-cyanoethyl)-2-(3-methyl-5-nitro-2-pyridinyl)malonate | C16H19N3O6 | 详情 | 详情 | |
| (IV) | 29074 | 4-(3-methyl-5-nitro-2-pyridinyl)butanenitrile | C10H11N3O2 | 详情 | 详情 | |
| (V) | 29075 | 4-(5-amino-3-methyl-2-pyridinyl)butanenitrile | C10H13N3 | 详情 | 详情 | |
| (VI) | 29076 | 6-(4-aminobutyl)-5-methyl-3-pyridinamine | C10H17N3 | 详情 | 详情 | |
| (VII) | 29077 | 4-(5-bromo-3-methyl-2-pyridinyl)-1-butanamine | C10H15BrN2 | 详情 | 详情 | |
| (VIII) | 22953 | 5-(6-Methylpyridin-3-ylmethyl)-2-(nitroamino)pyrimidin-4(1H)-one | C11H11N5O3 | 详情 | 详情 |