We have observed that addition of activated potassium fluoride (lh, lOOo/Ol torr), in amounts ranging from 50-100% molar excess referred to initial m-CPBA, to the crude CH2C12- reaction mixtures resulting from conventional Baeyer-Villiger and epoxidation procedures, and stirring the mixture lh at room temperature led to complete precipitation of m-CPBA and m-CBA. From the acid-free filtrates the corresponding reaction products can be isolated by ...