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The catalytic asymmetric Diels–Alder reaction of quinone imine ketals with diene carbamates catalyzed by axially chiral dicarboxylic acids is reported herein. A variety of primary and secondary alkyl‐substituted quinone derivatives which have not been applied in previous asymmetric quinone Diels–Alder reactions could be employed using this method. More importantly, we succeeded in developing a strategy...
Wandelbares Dipolarophil: Die Titelreaktion verlief hoch stereoselektiv in Gegenwart einer axial‐chiralen Dicarbonsäure (siehe Schema). Wurden vinyloge Aza‐Enamine, die über eine Umpolung zugänglich sind, als neuartige Dipolarophile eingesetzt, so konnte dabei außerdem auf die 1,3‐dipolare Cycloaddition mit inversem Elektronenbedarf umgeschaltet werden.
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