Synthesis of new thieno[2,3-d]pyrimidines, thieno[3,2-e]pyridines, and thieno[2,3-d][1,3]oxazines
作者:Shrikant B. Kanawade、Shivaraj P. Patil、Prashant S. Nikam、Sachin A. Gangurde、Madhukar N. Jachak、Raghunath B. Toche
DOI:10.1002/jhet.748
日期:2012.3
o‐Aminothiophene dicarbonitrile 1 on neat reaction with cyclic ketones in anhydrous ZnCl2 yielded mixture of fused aminopyridine 3 and iminospirooxazine 4 derivatives. Similarly, pyrimidine derivatives 5 and 8 were obtained by the reaction of this intermediate 1 with formic acid and DMF‐DMA followed by hydrazine hydrate, respectively. The reaction of o‐amino‐thiophene dicarboxamide 2 at ambient temperature
o-氨基噻吩二腈1与无水ZnCl 2中的环酮发生纯反应,可得到熔融的氨基吡啶3和亚氨基螺并恶嗪4衍生物的混合物。同样,嘧啶衍生物5和8是通过中间体1与甲酸和DMF-DMA分别与水合肼反应而获得的。的反应ø -氨基-噻吩二甲酰胺2在环境温度下与环酮,得到spiropyrimidine 10定量产率的鞋底制品。区域选择性芳基嘧啶9,通过分别在哌啶和碘的存在下与芳族醛反应,得到11,和二氢嘧啶12的衍生物。J.杂环化学。(2012)。