خدابخش نیکنام

in this work a simple and efficient method for one-pot synthesis benzo[a]quinolino[2,3-c]phenazin derivatives by the reaction of aromatic amines and aldehydes and 2-hydroxy-1,4-naphthoquinone, o-phenylenediamines in the presence of p-toluene sulfunic acid as catalyst, has been introduced.