Ketone peroxide derivatives, their preparation and use

A process for the preparation of mixed diperoxides having the formula Va and Vb:

• wherein R1 and R2 are independently selected from the group consisting of hydrogen, C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 aralkyl, and C1-C20 alkaryl, which groups may include linear or branched alkyl moieties;
• and each of R1 and R2 may optionally be substituted with one or more groups selected from the group consisting of hydroxy, alkoxy, linear or branched alkyl, aryloxy, halogen, ester, carboxy, nitrile, and amido, and R3 is independently selected from the group consisting of C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 aralkyl, and C7-C20 alkaryl, which groups may include linear or branched alkyl moieties;
• and R3 may optionally be substituted with one or more groups selected from hydroxy, alkoxy, linear or branched alkyl, aryloxy, halogen, ester, carboxy, nitrile, and amido, wherein the monoperoxy ester or monoperoxy carbonate having one of the following formulae
• is reacted with an alkyl vinyl ether with the formula VI:
• wherein and R5 is independently selected from the same group as R3 and R6 and R7 are independently selected from the same group as R1 and R2, in an inert two-phase solvent system comprising an apolar solvent.