Add time:08/28/2019         Source:sciencedirect.com

The partial reduction of carboxylic acids and their derivatives to aldehydes is a nontrivial exercise in synthetic chemistry with a large number of methods existing to achieve this transformation. The purpose of this chapter is to give the reader an overview of these methods by subdividing the chapter into the various common carboxylic acid derivatives (acids, esters, amides, etc.). The methods are then discussed within these contexts, with a goal of highlighting their positive and negative aspects. This work introduces a number of advances in this field since the first edition of COS in 1991; a number of methods which were covered in the first edition have been removed since they have not found application in the modern literature and involved complicated reagents with no synthetic advantage over conventional means. This was done in favor of newer methods that have emerged and now jostle for the attention of synthetic chemists.

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