Reduction of Diene Adducts ofLaevopimaric Acid

Abstract

Diene adducts of laevopimaric acid with maleic anhydride or fumaric acid were reduced with LiAIH 4 . Besides a triol, a monoacid and the corresponding lactone were obtained from the maleic acid adduct. The fumaric acid adduct afforded two triols with different con®guration at C-16. Regioselective reduction of the maleic anhydride adduct with NaBH 4 gave a lactone.