A FACILE METHOD WITH IMPROVED YIELDS IN THE SYNTHESIS OF 6-ARYLPYRIDO[2′,3′:4,5]PYRIMIDO[1,6-a]BENZIMIDAZOLES
作者:G. Suma、R. H. Bahekar、A. R. R. Rao
DOI:10.1080/00304940009356756
日期:2000.2
work on the synthesis and bronchodilator activity of some new fused quinazolines,’ we carried out the preparation of some fused pyridopyrimidines as isosteres of the quinazoline moiety. A literature survey revealed that the title compounds (4) have been synthesized with overall yields of about 34%.3.4 We now report the preparation of the above compounds by a route analogous to the synthesis of benzimidazoquinazolines
尽管治疗指数较窄,但甲基黄嘌呤是用于治疗哮喘的主要支气管扩张剂。正在研究基于黄嘌呤骨架设计的新杂环化合物作为具有更广泛安全范围的可能的支气管扩张剂。为了继续我们关于一些新的稠合喹唑啉的合成和支气管扩张活性的工作,我们进行了一些稠合吡啶并嘧啶的制备,作为喹唑啉部分的等排体。文献调查显示标题化合物(4)的合成总收率约为34%。3.4 我们现在报告通过类似于苯并咪唑并喹唑啉的合成路线制备上述化合物,?涉及温和的反应条件和简单的后处理程序,总产率提高(46-70%)。