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【结 构 式】 
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【分子编号】27996 【品名】(1S)-2-amino-1-methylethylamine 【CA登记号】 |
【 分 子 式 】C3H10N2 【 分 子 量 】74.12588 【元素组成】C 48.61% H 13.6% N 37.79% |
合成路线1
该中间体在本合成路线中的序号：(I)(rac)-1,2-Diaminopropane is resolved using (-)-L-tartaric acid. The bitartrate salt is treated with HCl to give the dihydrochloride salt, (-)-S-1,2-diaminopropane dihydrochloride (I). (I) in water is added to a solution of chloroacetic acid and sodium hydroxide below 20 C, and allowed to stand at room temperature for 7 days. After concentration and filtration, the product is isolated by passing the filtrate down an ion exchange column and eluting with water. The portion of the eluate containing the bulk of the optical activity is concentrated by heating. Crystals of (+)-(S)-1,2-propylene dinitrilotetraacetic acid (II) are obtained by filtration. (II) is heated under nitrogen for 20 h at 165 C to give (+)-(S)-1,2-di(piperazine-2,6-dione)propane.
| 【1】 NS-2330 enters phase IIb in Alzheimer's disease. J Pharm Sci 1976, 65, 238-242. |
| 【2】 Eastland, G.; ICRF-187. Drugs Fut 1987, 12, 11, 1017. |
合成路线2
该中间体在本合成路线中的序号：(II)The chiral diamine (II) was obtained by resolution of racemic 1,2-diaminopropane (I) with D-tartaric acid. Condensation of diamine (II) with formaldehyde and NaCN produced the tetranitrile (III). Acidic hydrolysis of tetranitrile (III) produced tetraamide (VI). The cyclization of (VI) upon heating in phenol furnished the title bis-piperazinedione. The cyclization of tetraamide (VI) has also been reported using polyphosphoric acid or sodium (methylsulfinyl)methyde. Alternatively, the synthesis of Dexrazoxane can be performed by by alkylation of diamine (II) with chloroacetic acid (IV) by means of NaOH in water to afford tetraacid (V), which is then subjected to cyclization in hot formamide.
| 【1】 Miller, W.D.; Process for preparing (S)(+)-4,4'-(1-methyl-1,2-ethanediyl)-bis(2,6-piperazinedione). EP 0284594 . |
| 【2】 Tu, C.-Y.J.; Clark, G.W.; Borsotti, G.; Process for preparing bis(3,5-dioxopiperazinyl)alkanes or alkenes. EP 0330381 . |
| 【3】 Creighton, A.M. (National Research Development Corp.); (3,5,3',5'-Tetraoxo)-1,2-dipiperazinoalkane cpds. and process for their preparation. DE 1910283; DE 1967027 . |
| 【4】 Holthuis, J.J.M.; MacDonald, P.L.; Stradi, R.; Rossetto, P. (EuroCetus BV); Process for preparing (S)(+)-4,4'-(1-methyl-1,2-ethanediyl)-bis(2,6-piperazinedione). WO 9308172 . |
| 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) | 30691 | 1,2-propanediamine; 2-amino-1-methylethylamine | 78-90-0 | C3H10N2 | 详情 | 详情 |
| (II) | 27996 | (1S)-2-amino-1-methylethylamine | C3H10N2 | 详情 | 详情 | |
| (III) | 55629 | 2-[{(1S)-2-[bis(cyanomethyl)amino]-1-methylethyl}(cyanomethyl)amino]acetonitrile | C11H14N6 | 详情 | 详情 | |
| (IV) | 11847 | 2-Chloroacetic acid; Chloroacetic Acid | 79-11-8 | C2H3ClO2 | 详情 | 详情 |
| (V) | 27997 | 2-[[(1S)-2-[bis(carboxymethyl)amino]-1-methylethyl](carboxymethyl)amino]acetic acid | C11H18N2O8 | 详情 | 详情 | |
| (VI) | 55630 | 2-((2-amino-2-oxoethyl){(1S)-2-[bis(2-amino-2-oxoethyl)amino]-1-methylethyl}amino)acetamide | C11H22N6O4 | 详情 | 详情 |