摘要:
Under the appropriate reaction conditions and stoichiometries the combination of a Cu(I) complex, t-BuOOH and molecular oxygen generates a catalyst that is capable of oxidizing alkanes, alkenes, alcohols and triphenyl phosphine under one atmosphere oxygen pressure and at room temperature. Particularly impressive is the performance of those catalysts over substrates containing allylic methylenes in terms of both reaction efficiencies and selectivities. For instance, for ethylbenzene the system 3 5 mM/t-BuOOH 10 mM; O-2 1 atm/PhCH2Me 1 M in ac:py (1:2) as the solvent forms 57.7 mM acetophenone. Cyclohexene under similar reaction conditions yields 85.4 mM 2-cyclohexene-1-one and 3.5 mM 2-cyclohexene-1-ol. (C) 1999 Elsevier Science B.V. All rights reserved.