Methyltrioxorhenium supported on silica tethered with polyethers as catalyst for the epoxidation of alkenes with hydrogen peroxide

Abstract

Methyltrioxorhenium has been supported on silica functionalized with polyether tethers; in the absence of an organic solvent, this catalytic assembly catalysed the epoxidation of alkenes with 30% aqueous H₂O₂ in high selectivity compared to the ring opening products observed in homogeneous media.

References

1. F. R. Hartley, Supported Metal Complexes, Reidal, Dordrecht, 1985; R. A. Sheldon, Curr. Opin. Solid State Mater. Sci., 1996, 1, 101.
2. P. E. Rony, J. Mol. Catal., 1975, 1, 13; M. E. Davis, Chemtech, 1992, 498; K. T. Wan and M. E. Davis, Nature, 1994, 370, 449.
3. R. Neumann and M. Cohen, Angew. Chem., Int. Ed. Engl., 1997, in the press.
4. W. A. Herrmann, R. W. Fisher, M. U. Rauch and W. Schere, J. Mol. Catal., 1994, 86, 243; A. M. Al-Ajlouni and J. H. Espenson, J. Am. Chem. Soc., 1995, 117, 9243.
5. W. A. Herrmann, R. W. Fisher, W. Schere and M. U. Rauch, Angew. Chem. Int. Ed. Engl., 1993, 32, 1157.
6. F. Fringuelli, F. Pizzo, R. Germani and G. Savelli, Org. Prep. Proced. Int., 1989, 21, 757.
7. C. J. Brinker, Sol-Gel Science, Academic Press, 1990.