摘要:
CF3-Substituted alkenes have been described to be good partners in Diels-Alder reactions with the Danishefsky's diene and in 1,3-dipolar cycloadditions with nitrones and non-stabilized azomethine ylides. The influence of the CF3-group on both the activation of the double bond and the stereochemistry of the cycloaddition has been evaluated. New CF3-substituted mono- and polycyclic compounds 4 and 7, highly functionalized isoxazolidines 18, 19, 22 and 23 and pyrrolidines 12, 13 and 16 have been prepared.