The content of this book includes two types of observations based on the synthesis of quinoline derivatives and some nitrogen containing reaction intermediates such as beta-amino carbonyl compounds and beta-nitroalcohol via one pot multicomponent/multistep approach using reusable greener catalyst or medium and also include Ionic liquids as greener solvent or catalyst in organic synthesis, water as greener solvent in organic synthesis.Krushna Kumar Jilariya is currently pursuing his PhD. He has published more than five research papers in national and international journals. He also published two books. Yogesh Sanghani is getting his PhD soon. He has also published several research papers in national and international journals. He has also published two books.