Face-Selective and endo-Selective Cycloadditions with Enantiomerically Pure Cyclopentadienes
A general synthetic route to the enantiopure bicyclic cyclopentadienes (S)-3 and (R)-3 of the hydrindane series, starting from the Hajos-Wiechert ketone 4 or its enantiomer is described.Reasons for the excellent face and endo selectivity of cycloadditions
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 stabili