New synthetic route to pyrimido[4,5-g]quinazoline-4,9-diones

A facile and moderate to high yielding protocol is reported for the synthesis of 2,7-bis(5-bromothiophen-2-yl)3,8-bis(2-decyltetradecyl)-3,8-dihydropyrimido[4,5-g]quinazoline-4,9-dione, which can be potentially used to synthesize other pyrimido[4,5-giquinazoline-4,9-diones. Moreover, new pyrimido[4,5-glquinazoline-4,9-diones synthesized by this route can potentially be used as organic semiconductors. (C) 2015 Published by Elsevier Ltd.