Abstract: Ring-closing metathesis reactions involving diallyldiphenylsilane and diallyloxydiphenylsilane were successfully performed by using only 0.01 mol or even less of Grubbs' catalyst 1. The effects of reaction parameters, such as solvents, temperature and concentration of the catalyst are discussed.

Key words: Ring-closing metathesis reaction, Grubbs' catalyst, Diallyldiphenylsilane, Diallyloxydiphenyl-silane