Synthetic studies on the C/D ring segment of limonoids
Abstract
The diketone 3 has been synthesized from 4,7a-dimethyl-2,3,6,7-tetrahydroindene-1,5-dione 4. The furyl alcohol 7 has been dehydrated to give the cyclopentene 9 and the resulting epoxide 10 and the diol 11 have been converted into the diketone 3. Attempted Baeyer–Villiger oxidation of the dione 3 failed to give the expected lactone 2.