The intermediates discussed in this book include different types of phenols, aldehydes, carboxylic acids, and ketones (acetophenones, w-substituted acetophenones, propiophenones, butyrophenones, benzophenones, phenyl ketones and some miscellaneous ketones). The preparation of heterocyclic compounds (O-containing, S-containing, N-containing, N & S-containing) is also described. The synthesis of certain miscellaneous compounds of the type benzyl cyanides, b-ketoesters, chalcones, naphthaquinones, benzoquinones, stilbene and certain catalysts and reagents required for organic synthesis is addressed. The present book aims to make available detailed procedures for the synthesis of diverse intermediates, which are generally required by organic chemists working in various universities, industries, and by the research scholars at different levels. No single publication is available describing the intermediates required for organic synthesis. An attempt has been made to describe the best possible procedures with ample experimental details keeping in mind the maximum yield. The authors and their associates have verified all the procedures described.