【结 构 式】 |
【分子编号】23949 【品名】N2-Nitroguanidine 【CA登记号】 |
【 分 子 式 】CH4N4O2 【 分 子 量 】104.06852 【元素组成】C 11.54% H 3.87% N 53.84% O 30.75% |
合成路线1
该中间体在本合成路线中的序号:(IX)The reaction of 2-chloro-4-cyanopyridine (I) with sodium methoxide in refluxing methanol gives 2-methoxy-4-cyanopyridine (II), which by reduction with H2 over Raney-Ni and semicarbazide HCl in water-ethanol is converted to 2-methoxypyridine-4-carboxyaldehyde (III). The condensation of (III) with malonic acid (IV) by means of piperidine in hot pyridine yields 3-(2-methoxy-4-pyridyl)acrylic acid (V), which is esterified with ethanol and H2SO4 to the ethyl ester (VI). The reduction of (VII) with H2 over Pd/C in ethanol affords the corresponding propionate (VII). Formylation of (VII) with ethyl formate and NaH gives ethyl 2-formyl-3-(2-methoxy-4-pyridyl)propionate (VIII), which is cyclized with nitroguanidine (IX) by means of sodium methoxide in refluxing methanol yielding 2-nitroamino-5-12-methoxy-4-pyridylmethylpyrimidin-4(1H)-one (X). The reaction of (X) with 2-[5-(dimethylaminomethyl)-2 furylmethylthio]ethylamine in refluxing ethanol gives the O-methyl derivative of SK&F 93574 (XII), whicn is finally deprotected with HCl in refluxing ethanol.
【1】 Brown, T.H.; Ife, R.J. (SmithKline Beecham plc); Pyrimidine compounds. DD 140252; EP 0003677; ES 477667; US 4234588; US 4649141 . |
【2】 Adger, B.M.; Lewis, N.J. (SmithKline Beecham plc); Chemical process. EP 0141560 . |
【3】 Prous, J.; Castaner, J.; SK&F-93574. Drugs Fut 1986, 11, 8, 671. |
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) | 23944 | 1-Hydrazinecarboxamide | 563-41-7 | CH5N3O | 详情 | 详情 |
(I) | 23940 | 2-Chloro-4-pyridinecarbonitrile; 2-chloroisonicotinonitrile | 33252-30-1 | C6H3ClN2 | 详情 | 详情 |
(II) | 23943 | 2-methoxyisonicotinonitrile | C7H6N2O | 详情 | 详情 | |
(III) | 23941 | 2-methoxyisonicotinaldehyde | C7H7NO2 | 详情 | 详情 | |
(IV) | 12963 | Malonic acid | 141-82-2 | C3H4O4 | 详情 | 详情 |
(V) | 23945 | (Z)-3-(2-methoxy-4-pyridinyl)-2-propenoic acid | C9H9NO3 | 详情 | 详情 | |
(VI) | 23946 | ethyl (Z)-3-(2-methoxy-4-pyridinyl)-2-propenoate | C11H13NO3 | 详情 | 详情 | |
(VII) | 23947 | ethyl 3-(2-methoxy-4-pyridinyl)propanoate | C11H15NO3 | 详情 | 详情 | |
(VIII) | 23948 | ethyl 2-formyl-3-(2-methoxy-4-pyridinyl)propanoate | C12H15NO4 | 详情 | 详情 | |
(IX) | 23949 | N2-Nitroguanidine | CH4N4O2 | 详情 | 详情 | |
(X) | 23950 | 5-(2-Methoxypyridin-4-yl)-2-(nitroamino)pyrimidin-4(1H)-one | C11H11N5O4 | 详情 | 详情 | |
(XI) | 13851 | 2-[([5-[(Dimethylamino)methyl]-2-furyl]methyl)sulfanyl]-1-ethanamine; N-[(5-[[(2-Aminoethyl)sulfanyl]methyl]-2-furyl)methyl]-N,N-dimethylamine | C10H18N2OS | 详情 | 详情 | |
(XII) | 23951 | 2-([2-[([5-[(dimethylamino)methyl]-2-furyl]methyl)sulfanyl]ethyl]amino)-5-[(2-methoxy-4-pyridinyl)methyl]-4(1H)-pyrimidinone | C21H27N5O3S | 详情 | 详情 |