Abstract
Diels–Alder reactions of 2-pyrones with alkenes can provide highly functionalized [2,2,2]-bicyclic lactones under mild reaction conditions. Synthetic utilizations of these reactions have been well demonstrated in natural-product synthesis. Although several catalytic asymmetric strategies have been realized, current research in this area is still largely underdeveloped. Recent advances in enantioselective inverse-electron-demand Diels–Alder reactions with Lewis acid catalysis are reviewed.
1 Introduction
2 State of the Art of Enantioselective Diels–Alder Reactions of 2-Pyrones by Lewis Acid Catalysis
3 Enantioselective Synthesis of Arene cis-Dihydrodiols by Diels–Alder/Retro-Diels–Alder Reactions of 2-Pyrones
4 Enantioselective Synthesis of cis-Decalin Derivatives by Diels–Alder Reactions of 2-Pyrones
5 Conclusions
Key words
pyrones - asymmetric catalysis - Diels–Alder reactions - Lewis acid catalysis - natural product synthesis