NEW 8-OXABICYCLO[3.2.1]OCT-6-EN-3-ONE DERIVATIVES WITH PLANT-GROWTH REGULATORY ACTIVITY

Several 8-oxabicyclo[3.2.1]oct-6-en-3-one derivatives have been prepar ed via the [3 + 4] cycloaddition between the oxyallyl carbocation gene rated from polybromoketones and alkylfurans. The selective effects of these compounds on the radicle growth of a monocotyledon [sorghum (Sor ghum bicolor L.)] and a dicotyledon [cucumber (Cucumis sativus L.)] we re evaluated. All of the test compounds, at the concentration of 100 m u g mL(-1), stimulated cucumber root growth (5-30%), but they inhibite d sorghum root growth (23-56%). None of the compounds had any effect o n the percent of germination of the species tested.