Abstract

Methyltrioxorhenium/3-methylpyrazole has proved to be an efficient catalytic system for epoxidation of alkenes with aqueous 35% H 2O 2 in excellent yields under organic solvent-free conditions. The yields of epoxides by the organic solvent-free epoxidation are comparable to those using CH 2Cl 2 as the organic solvent. The epoxidations of simple alkenes under organic solvent-free conditions are slower than those in CH 2Cl 2, while the epoxidations of alkenols such as citronellol are faster than those in CH 2Cl 2.

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