This book provides a concise introduction to pericyclic and photochemical reactions for organic synthesis. In the first part about pericyclic reactions, the author explains electrocyclic reactions, cycloaddition reactions, sigmatropic rearrangements, and group transfer reactions. The second part on photochemistry is dedicated to photochemical reactions of a variety of compound classes, including alkenes, dienes, and polyenes, carbonyl compounds, and aromatic compounds. Additionally, photofragmentation reactions are described in a dedicated chapter. The last chapter gives an outlook on applications of photochemistry and natural photochemical phenomena. Both parts start with a comprehensive presentation of the general principles of the pericyclic and photochemical reactions. All chapters are rich in examples, which help illustrate the explained principles and establish ties to results and trends in recent research. Additionally, each chapter offers exercises for students, and solutions to the problems are provided in a separate appendix. This book nicely illustrates the utility of pericyclic and photochemical reactions and provides students and researchers with the tools to apply them routinely for an efficient synthesis of complex organic molecules. It will therefore appeal to advanced undergraduate students, graduate and postgraduate students, and even to practitioners and scientists in the field of organic synthesis. The rich examples and exercises will also make it a versatile tool for teachers and lecturers.

Professor Biswanath Dinda completed his undergraduate and postgraduate courses at the University of Calcutta, India. He received his PhD in 1974 for his research in the field of natural products chemistry, carried out in the Chemistry Department of Calcutta University in the research group of Prof. P. L. Majumder. Prof. Dinda spent his postdoc time at Ohio State University, working in the research group of Prof. Jack L. Beal at the College of Pharmacy from 1976-1978. After his return from the USA, he first worked as a lecturer in Chemistry in an undergraduate college, and then joined the Calcutta University Post Graduate Centre in Agartala, Tripura, India as a senior lecturer in 1981. From 1993, Prof. Dinda held a position as full Professor at Tripura University, from which he retired as senior-most professor in 2012. Prof. Dindas research interests have focused on the discovery of various herbal drugs from locally available plants. During his longstanding experience ofover 30 years as lecturer and university professor, he has taught various (organic) chemistry courses, especially in the chemistry of pericyclic and photochemical reactions and the spectroscopy and chemistry of natural products.

Part I Pericyclic Reactions: General aspects of pericyclic reactions.- Electrocyclic reactions.- Cycloaddition reactions.- Sigmatropic rearrangements.- Group transfer reactions.- Part II Photochemical Reactions: Principles of photochemical reactions.- Photochemistry of alkenes, dienes, and polyenes.- Photochemistry of carbonyl compounds.- Photochemistry of aromatic compounds.- Photofragmentation reactions.- Photochemistry of nature and applied photochemistry.-Appendix: Solutions to the problems.