Efficient synthesis of 2,4-disubstituted quinolines: calix[n]arene-catalyzed Povarov-hydrogen-transfer reaction cascade†
Abstract
A cascade process involving the Povarov reaction and hydrogen transfer catalyzed with p-sulfonic acid calix[4]arene was disclosed and afforded the synthesis of 2,4-disubstituted quinolines in good yields under appropriate conditions in a single pot process.