The Michael reaction of (+)-2-caranone (1) with methyl vinyl ketone, ethyl vinyl ketone or methyl acrylate was utilized for synthesis of corresponding diketones 4 and 5 and keto ester 8. These compounds were subjected to cyclization to obtain the sesquiterpenoid systems.
The Michael reaction of (+)-2-caranone (1) with methyl vinyl ketone, ethyl vinyl ketone or methyl acrylate was utilized for synthesis of corresponding diketones 4 and 5 and keto ester 8. These compounds were subjected to cyclization to obtain the sesquiterpenoid systems.