This book includes the convenient and useful methods for the synthesis of Novel heterocycles and organic molecules and studied their anti-HIV NNRTI activity. In the second part of our work, we studied the concept of l-proline- thiaurea based bifunctional organicatalyst for Asymmetric Aldol reaction. Synthesis of Novel heterocycles such as oxochromenyl xanthenones, Chromeno-Chromenones, Thiazolidinones, Pyrazolothiazoles, triazolyl pyrimidinones, triazolyl phenyl thiazoles and Organocatalyst is neatly described. The aim of this book to provide guidelines to synthesize and improve the...