Pericyclic reactions are seminal processes in organic synthesis. They have long been utilized to form multiple bonds and stereo centers in a single operation, and have found application in the total synthesis of natural products and a multitude of other endeavors. The current book covers contributions from renowned international researchers in organic synthesis in which pericyclic reactions feature as key transformations. This book aims at explaining the different types of pericyclic reactions, the stereochemistry of the same and simple rules to predict the feasibility of the reaction and the stereo chemical outcome. The book provides complete and systematic coverage of pericyclic reactions for researchers and students dealing with the field of pharmacy and organic chemistry.