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【结 构 式】 
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【分子编号】62951 【品名】chloromethyl 6-(5-chloro-2-pyridinyl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl carbonate 【CA登记号】 |
【 分 子 式 】C13H8Cl2N4O4 【 分 子 量 】355.13648 【元素组成】C 43.97% H 2.27% Cl 19.97% N 15.78% O 18.02% |
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：rac-(III)The esterification of (rac)-6-(5-chloro-3-pyridyl)-5-hydroxy-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-7-one rac-(I) with chloromethyl chloroformate (V) in pyridine gives the racemic carbonate rac-(III), which is submitted to an enantioselective hydrolysis with Candida antarctica (SP 435L) lipase in dioxane/benzyl alcohol yielding a mixture of rac-(I), which is recycled, and enantiomerically pure (96% e.e.) (S)-(III). Finally, this compound is condensed with 1-methylpiperazine (IV) in acetone.
| 【1】 Culy, C.; Castañer, J.; Bayes, M.; Eszopiclone. Drugs Fut 2003, 28, 7, 640. |
| 【2】 Solares, L.F.; Diaz, M.; Brieva, R.; Sanchez, V.M.; Bayod, M.; Gotor, V.; Enzymatic resolution of new carbonate intermediates for the synthesis of (S)-(+)-zopiclone. Tetrahedron Asymmetry 2002, 13, 23, 2577. |
| 【3】 Gotor, V.; et al.; Enzymic resolution of (±)-6-(5-chloropyridin-2-yl)-7-vinyloxycarbonyloxy-6,7-dihydro[5H] pyrrolo[3,4-b]pyrazin-5-one. Synthesis of (+)-zopiclone. Tetrahedron Asymmetry 1997, 8, 7, 995. |
| 【4】 Cotrel, C.; et al. (Aventis Pharma SA); Pyrrolo-[3,4,b]pyrazine derivatives. DE 2300491; GB 1358680; JP 52048687; US 3862149 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| rac-(I) | 32796 | 6-(5-chloro-2-pyridinyl)-7-hydroxy-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-one | C11H7ClN4O2 | 详情 | 详情 | |
| rac-(III) | 62951 | chloromethyl 6-(5-chloro-2-pyridinyl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl carbonate | C13H8Cl2N4O4 | 详情 | 详情 | |
| (S)-(III) | 62952 | chloromethyl (5S)-6-(5-chloro-2-pyridinyl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl carbonate | C13H8Cl2N4O4 | 详情 | 详情 | |
| (IV) | 10061 | 1-Methylpiperazine; 1-Methyl piperazine; N-Methylpiperazine | 109-01-3 | C5H12N2 | 详情 | 详情 |
| (V) | 19249 | Chloromethyl chloroformate; Chloro[(chlorocarbonyl)oxy]methane | 22128-62-7 | C2H2Cl2O2 | 详情 | 详情 |
Extended Information