Synthesis of polybenzoquinazolines via an intramolecular dehydration of photocyclization

An environmentally friendly protocol has been developed for the synthesis of benzo[h]-naphth[1,2-f]quinazolines and benzo[h]-phenanthren[9,10-f]quinazoines in moderate to high yields from 4-(2-hydroxyphenyl)-5-(naphthalen-1-yl)pyrimidines and 4-(2-hydroxyphenyl)-5-(phenanthren-1-yl) pyrimidines by the intarmolecular dehydration of photocyclization.