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Synthesis of endotetracyclo[5.5.2.0. 2,6 0 8,12 ]tetradeca-3(4),8(12)-dien-13-one from 5-indanol and photoreactions in singlet and triplet excited state leading to complex polycyclic systems is reported. Crystal structure of 14-spiroepoxyendotetracyclo[5.5.2.0. 2,6 0 8,12 ] tetradeca-3(4),8(12)-dien-13-one is also reported.
A total synthesis of hirsutene, a triquinane sesquiterpene, from salicyl alcohol is reported. Oxidation of salicyl alcohol in the presence of cyclopentadiene gave 9-spiroepoxy-endo-tricyclo[5.2.2.0 2,6 ]undeca-4,10-dien-8-one which was elaborated to the 3-hydroxy-2-methyl-endo-tricyclo[5.2.2.0 2,6 ]undeca-10-en-8-one containing major structural and functional features of hirsutene...
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