Organic and medicinal chemistry are definitely the principal branches of chemistry as they are more widely studied than any other subjects in chemistry. Very often, organic and medicinal chemistry have been defined as a hybrid discipline of many other subjects that include biology, chemistry, medicine and pharmacy. The synthesis of molecules, mechanism of a process, studies of new reagents, natural products, biological and pharmacological evaluation of molecules against different components of cells are the key subjects in these two areas. On the basis of unlimited possibilities, one can imagine several scopes exist for students, researchers and industrialists to study and explore organic and medicinal chemistry. In this book, an attempt has been made to include diverse research topics to benefit the readers from different standpoints. This book has nine chapters from active authors. Scientists are convinced that organic and medicinal chemistry have no boundaries in science. The application of these chemical and medicinal sciences is huge and they are related to many significant discoveries. On this basis, the book will be useful for chemists, biologists, clinicians, pharmacists, biotechnologists, industrialists and engineers who are working in the field of interdisciplinary science as well as specific chemical and medicinal science.