This book covers the various approaches of Vilsmeier-Haack reaction and their synthetic applications. The work of the book is devoted to a study of a series of organic reactions which employs Vilsmeier-Haack reaction to synthesize various heterocyclic derivatives. Vilsmeier-Haack reaction is a key step for the conversion of various functional groups to desire group/moiety. Recent advances in the Vilsmeier-Haack reaction is elaborated with their wide range of synthetic applications that may help the researchers for future endeavor in organic synthesis. Improved and modified conditions applied...