Acid-catalysed acylation of carbonyl compounds

Data concerning the O- and C-acylation of carbonyl compounds under acid catalysis conditions are surveyed. The properties of little-studied products of these reactions, i.e., acylals, α-haloalkyl acylates, and enol acylates are described. The acyloxycarbocations formed by acylation of aldehydes and ketones are characterised. The recently discovered new reactions of carbonyl compounds that lead to various heterocyclic and polyfunctional compounds are discussed.The bibliography includes 275 references.