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