23 research outputs found
Studies on the Constituents of Swertia japonica MAKINO I. On the Structures of New Secoiridoid Diglycosides
Highly Enantioselective Total Synthesis of (−)-(3′S)-Lomatin and (+)-(3′S,4′R)-trans-Khellactone
Concise highly enantioselective three-step syntheses are described for (-)-(3'S)-lomatin and (+)-(3'S,4'R)-trans-khellactone from 7-hydroxycoumarin in 97% ee and in 57% and 58% overall yields, respectively, using nonaqueous enantioselective epoxidation by an iminium salt as the key step