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題 名 | Synthesis of Pyrimidines, Thienopyrimidines and Pyrazolopyrimidine |
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作 者 | El-dean,Adel. M.; Abdel-moneamMaisa E.; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 49:6 2002.12[民91.12] |
頁 次 | 頁1057-1060 |
分類號 | 346.01 |
關鍵詞 | Synthesis; Pyrimidines; Thienopyrimidines and pyrazolopyrimidines; |
語 文 | 英文(English) |
英文摘要 | 5-Ethoxycarbony-4-methyl-2-phenylpyrimidin-6(1H)-thione (3), which was prepared from the reaction of ethyl β -aminocrotonate 1 with benzoyl isothiocyanate (2) in refluxing acetone, was reacted with halo compounds to give S-alkyl derivatives 4a-h. Treatment of compounds 4a-c with sod. ethoxide cyclized into thienopyrimidine 10a-c. Hydrazinolysis of compound 3 gave hydroxypyrazolopyrimidine derivative 6. Also the latter compound was obtained upon heating compound 4a with hydrazine hydrazine hydrate under neat conditions, but when compound 4a refluxed with hydrazine hydrate in ethanol the corresponding carbohydraide 5 was produced. |
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