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【结 构 式】

【分子编号】21873

【品名】3-(2-thienyl)-5,6-dihydro-2(1H)-pyrazinone

【CA登记号】

【 分 子 式 】C8H8N2OS

【 分 子 量 】180.2304

【元素组成】C 53.31% H 4.47% N 15.54% O 8.88% S 17.79%

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:(III)

The cyclization of ethyl 2-(2-thienyl)glyoxylate (I) with ethylenediamine (II) in refluxing ethanol gives 3-(2-thienyl)-1,2,5,6-tetrahydropyrazin-2-one (III), which is reduced with H2 over Raney Nickel (RaNi) in hot ethanol at 50 bar.

1 Beyerle, R.; Bender, H.; Schindler, U.; Nitz, R.-E.; Martorana, P.A. (Cassella AG); Novel piperazinones, their preparation and use. DE 3132882; US 4598079 .
2 Tilford, C.H.; Carr, A.A. Jr.; Kuhn, W.L. (Aventis Pharmaceuticals, Inc.); Substd. 5,6-dihydro-2(1H)-pyrazinones. US 3056784 .
3 Castaner, J.; Prous, J.; Telnisetam. Drugs Fut 1988, 13, 2, 130.
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) 21871 ethyl 2-oxo-2-(2-thienyl)acetate 4075-58-5 C8H8O3S 详情 详情
(II) 14754 ethylenediamine;1,2-Diaminoethane;ethane-1,2-diamine;1,2-Ethanediamine 107-15-3 C2H8N2 详情 详情
(III) 21873 3-(2-thienyl)-5,6-dihydro-2(1H)-pyrazinone C8H8N2OS 详情 详情
Extended Information