Author/Authors :
Sheikhhosseini, Enayatollah Department of Chemistry, Faculty of Science, Kerman Branch, Islamic Azad University, Kerman, Iran., ايران , Ghazanfari, Dadkhoda Department of Chemistry, Faculty of Science, Kerman Branch, Islamic Azad University, Kerman, Iran., ايران , Nezamabadi, Vida Department of Chemistry, Faculty of Science, Kerman Branch, Islamic Azad University, Kerman, Iran., ايران
Abstract :
p-Dodecylbenzenesulfonic acid (DBSA) was used as a catalyst for a simple and efficient one-pot synthesis of aryl substititued tetrahydrobenzo[b]pyrans and dihydropyrano[c]chromens via initial Knoevenagel, subsequent Micheal and final heterocyclization reactions of aryl aldehyde, malononitrile and 4-hydroxycoumarin/dimedone in moderate to excellent yields. The present method was operationally simple and use of water as the reaction medium made the process environmentally benign.
Keywords :
Green media , Dihydropyrano[c]chromen , p , Dodecylbenzenesulfonic acid (DBSA) , Tetrahydrobenzo[b]pyran ,
