Surface-mediated reactions. 7. Unsupported reagents

[GRAPHICS] Some solid reagents traditionally supported on silica gel or alumina are al so effective as heterogeneous reactants in the absence of a support. Moist magnesium monoperoxyphthalate (MMPP), either suspended in CH2Cl2 or solvent less, is a convenient alternative to peroxycarboxylic acids for oxidation o f sulfides and epoxidation of alkenes, The latter reaction exhibits an unus ual order of reactivity: trisubstituted > disubstituted > tetrasubstituted, Unsupported moist Ca(OCl)(2) and OXONE are also effective oxidants.