Several catalytic oxidation reactions in sc-fluids are described in the literature. The RuO2-catalyzed (NaI04 as oxidant) synthesis of adipic acid from cyclohexene in the two-phase system C02- H20, has been reported [57].Alkene oxidation using tert-butylhydroperoxide (TBHP) and various catalysts in scC02 resulted in the highly selective formation of epoxides with total conversion, depending on the catalyst used [581.Carrying out the asymmetric Sharpless epoxidation in scCOz using Ti( TBHP, and di(isopropy1)tartrate(DIPT), yielded the epoxide in a remarkable ee of 87 % (Scheme 13.10) [58].
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