Catalyst-free synthesis of benzofuran-fused pyrido[4,3-d]pyrimidines from 2-(2-hydroxyaryl)acetonitrile and 4,6-dichloropyrimidine-5-carbaldehyde through domino condensation reactions†
Abstract
A rapid, one-pot, catalyst-free approach to novel benzofuran-fused pyrido[4,3-d]pyrimidines with good antitumor activities via a cascade SNAr/cyclization/condensation reaction through 2-(2-hydroxyphenyl)acetonitriles and 4,6-dichloropyrimidine-5-carbaldehyde was developed.