A Facile and Efficient Synthesis of Polynuclear Heterocycles: Azolothienopyrimidines and Thienothiazolopyrimidines with Antimicrobial Activity
作者:H. A. R. Hussein
DOI:10.1080/10426500701370342
日期:2007.7.19
The research group I am a member of is interested in the preparation of thieno[2, 3-d]pyrimidine fused with different heterocycles compounds with potential biological activity. 2-Arylmethylene derivatives 4a–g were prepared in one step by reacting 2-thioxothienopyrimidine derivatives 3a, b with chloroacetic acid and the proper aldehyde. The ester 3a and the acid 3b were alkylated at different reaction
我所在的研究组对制备具有潜在生物活性的不同杂环化合物稠合的噻吩并[2, 3-d]嘧啶感兴趣。通过将 2-硫代噻吩并嘧啶衍生物 3a、b 与氯乙酸和适当的醛反应,一步制备 2-芳基亚甲基衍生物 4a-g。酯 3a 和酸 3b 在不同的反应条件下被烷基化以产生 2-烷硫基衍生物 5a-d。5c的进一步烷基化产生N-3烷基化产物6。化合物5b、d在沸腾的乙酸酐/吡啶中环化以分别产生噻唑并噻吩并嘧啶酮衍生物7a、b。化合物 5a、c 与水合肼反应生成 2-肼基噻吩并嘧啶 8a、b,可用作三唑噻吩并嘧啶 9a、b 和吡唑基噻吩并嘧啶 10a-c 的前体,