Selfcondensation of some γ-keto acids in sulphuric acid
作者:P. Kolsaker、E. Berner
DOI:10.1016/0040-4020(73)80067-5
日期:1973.1
A novel type of selfcondensation of some aliphatic and aromatic γ-keto acids (capable of forming γ-lactols) in concentrated sulphuric acid is described. A mechanism for the reaction is proposed, where the key intermediates are the carbonium ion formed by loss of the OH group in the γ-lactols and the α,β-unsaturated γ-lactone with an exocyclic double bond in γ-position formed by loss of one molecule