Epoxidation of alpha-pinene catalyzed by methyltrioxorheniurn(VII): Influence of additives, oxidants and solvents

The epoxidation of alpha-pinene employing methyltrioxorhenium as catalyst is examined. The influence of mono- and bidentate Lewis basic additives (e.g. (t)butylpyridine, 4,4'-dimethyl-2,2'-bipyridine, and Schiff-bases) is investigated. Additionally the impact of the oxidant (H(2)O(2) in water or urea-hydrogen peroxide (UHP)) on the catalytic performance is studied. The effect of the solvent is also examined in order to determine the optimal conditions for the epoxidation of alpha-pinene. The best and straightforwardly applicable result is obtained when a ratio alpha-pinene:MTO:(t)butylpyridine:UHP of 200:1:40:600 is applied at 0 degrees C in nitromethane. In this case, alpha-pinene oxide is formed with 95     «

The epoxidation of alpha-pinene employing methyltrioxorhenium as catalyst is examined. The influence of mono- and bidentate Lewis basic additives (e.g. (t)butylpyridine, 4,4'-dimethyl-2,2'-bipyridine, and Schiff-bases) is investigated. Additionally the impact of the oxidant (H(2)O(2) in water or urea-hydrogen peroxide (UHP)) on the catalytic performance is studied. The effect of the solvent is also examined in order to determine the optimal conditions for the epoxidation of alpha-pinene. The bes...     »