ACID-CATALYZED ACYLATION OF CARBONYL-COMP OUNDS

Data concerning the O- and C-acylation of carbonyl compounds under aci d catalysis conditions are summarised. The properties of little-studie d products of these reactions, i.e., acylals, alpha-haloesters and eno l acylates are described. The acyloxycarbocations formed by acylation of aldehydes and ketones are characterised. The recently discovered no vel reactions of carbonyl compounds that lead to various heterocyclic and polyfunctional compounds are discussed.