A New MCR Strategy Generating a Collection of Skeletally Diverse Simple Molecules Combinatorially

Background: 1,4 Dihydropyridines (1,4 DHPs), chromeno[4,3-b] quinolines and pyrimido [4,5-b]quinolines are biologically and pharmaceutically important heterocycles. They are also present in many natural products. Many methods have been applied for their synthesis but each method has its own advantages as well as disadvantages. So, there is a scope to develop a new green and sustainable protocol for their synthesis. Keywords: Chromeno[4, 3-b]quinolines, iodine, pyrimido[4, 5-b]quinolines, Sc(OTf)3, 1, 4DHP.