作者:Ade L. M. Kamal El-Dean、Maisa E. Abdel-Moneam
DOI:10.1002/jccs.200200152
日期:2002.12
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 hydrate under neat conditions, but
5-Ethoxycarbonyl-4-methyl-2-phenylpyrimidin-6(1H)-thione (3) 由 β-氨基巴豆酸乙酯 1 与异硫氰酸苯甲酰酯 (2) 在回流丙酮中反应制备,与卤代化合物反应生成给出 S-烷基衍生物 4a-h。用草皮处理化合物4a-c。乙醇盐环化为噻吩并嘧啶 10a-c。化合物3的肼解产生羟基吡唑并嘧啶衍生物6。在纯净条件下将化合物4a与水合肼一起加热也得到后者化合物,但是当化合物4a与水合肼在乙醇中回流时,产生相应的碳酰肼5。