The reactivity of methyltrioxorhenium in the epoxidation of olefins can be tuned by the presence of Lewis bases as ligands of the metal center. Unfortunately, a large excess of ligand is usually required to obtain high yields and selectivities mainly because of the fluxionalbehaviour that these compounds show in solution. We describe here the microencapsulation technique that can resolve this problem
A pesticidal composition which comprises an insect growth regulating compound (for example, pyriproxyfen) and carane-3,4-diol (for example 1S,3S,4S,6R-carane-3,4-diol) as an active ingredient. The pesticidal composition is highly effective for pests, especially flea eggs.