Completely rewritten, this third edition aims to teach the fundamentals of heterocyclic reactivity and synthesis in a way that can be understood by undergraduate students. Also, more advanced material has been added for postgraduate courses and for those working with heterocyclic compounds in industry.;Early chapters present essential teaching material in concise resumes suitable either as introductions or as summaries for revision, with exercises and solutions provided to help students to understand and apply principles. The text then discusses the chemical reactivity and synthesis of particular heterocyclic systems. Original references are included throughout, as well as many review references.