Thermal Decomposition of Maleopimaric Acid in the Presence of Selenium
During thermal decomposition of maleopimaric acid (1) in the presence of selenium a high yield of dehydroabietic acid (3) can be obtained, if the selenium is dispersed by sonication.From temperature-dependent side products conclusions are drawn concerning the reaction path. - Keywords: Dehydroabietic acid; Retro-Diels-Alder-reaction; Ultra-sonic