Inclusion of alpha-phenyl-N-p-methylphenyl nitrone in beta-cyclodextrin: Formation of 1G : 1H and 1G : 2H complexes and the remarkably fast 1,3-dipolar cycloaddition of the 1G : 2H complex with olefins in the solid state

The nitrone is found to be included in the beta-cyclodextrin cavity in two different stoichiometries viz., 1G:1H and 1G:2H - the existence of which is proved by physical methods. The 1G:2H complex of the nitrone serves as a g ood potent dipolarophile in the 1,3-dipolar cycloaddition reactions with ol efins resulting in rate acceleration and regioselection.