Chiral Cyclopentadienes

Abstract
Efficient syntheses of enantiomerically pure cyclopentadienes which undergo stereoselective and regioselective high pressure cycloadditions with nonsymmetric dienophiles are reported. As these compounds show a quite high chemical as well as thermal stability they are useful as templates in the generation of pure enantiomers by diastereoselective adduct transformation and subsequent retro-Diels-Alder reaction.

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