An efficient synthesis of 9(10<i style="">H</i>)-acridinones under microwaves

Abstract

1958-1960N-Phenylanthranilic acids have been subjected to cyclisation with different catalysts like silica gel, acidic alumina, strongly acidic montmorillonite (K10) clay, acetic acid, PTSA or Lewis acids like ZnCl2, AlCl3 and PPA under microwave irradiation to give 9(10H)-acridinones of which PPA has been found to be the best catalyst for cyclisation