An intramolecular Michael reaction involving borate complexes. A novel synthesis of  -hydroxycarboxylic acids.
D001881:Borates; D002264:Carboxylic Acids / Q000138:chemical synthesis*; D006900:Hydroxylation; D008722:Methods; D013237:Stereoisomerism
D001881:Borates; D002264:Carboxylic Acids