Novel 2-Thioxanthine and Dipyrimidopyridine Derivatives: Synthesis and Antimicrobial Activity
作者:Samar El-kalyoubi、Fatmah Agili、Shaker Youssif
DOI:10.3390/molecules201019263
日期:——
treatment of 1 with different aromatic aldehydes in absolute ethanol in the presence of conc. hydrochloric acid at room temperature and/or reflux with acetic acid afforded bis-5,5́-diuracylmethylene 8a-e, which cyclized on heating with a mixture of acetic acid/HCl (1:1) to give 9a-e. Compounds 9a-e can be obtained directly by refluxing of Compound 1 with a mixture of acetic acid/HCl. The synthesized new
从6-氨基-1-甲基-2-硫氧嘧啶(1)开始,先进行亚硝化,还原并与不同的芳香醛缩合,以合成席夫碱,合成了几种稠合的咪唑并嘧啶。使用碘席夫碱脱氢环化/ DMF给化合物5A-G。的图5a-克使用简单的烷基化剂如硫酸二甲酯的甲基化((CH 3)2 SO 4),得到单烷基化的任一imidazolopyrimidine 6A-G在室温下或在加热图6a-克二烷基化衍生物7A-G((CH 3)2 SO 4)。在另一方面,治疗1与浓的存在下在无水乙醇中不同的芳族醛。盐酸在室温下和/或回流用乙酸,得到双-5,5- diuracylmethylene 8A-E,其环化在加热用乙酸的混合物/盐酸(1:1),得到图9A-E。化合物9A-E可直接通过用乙酸/盐酸的混合物中的化合物1的回流来得到。将合成的新化合物进行了筛选的抗微生物活性,和MIC测定。