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A useful method for epoxidation of alkenes with hydrogen peroxide in the presence of a catalytic amount (ca 1-5 mol%) of hexafluoroacetone trihydrate has been reported by R. A. Sheldon. In chloroform or DCM, reaction is relatively slow and yields moderate; with 1,1,1,3,3,3-Hexafluoro-2-propanol, A12747, as reaction medium, excellent yields of epoxides are obtained after a few hours at room temperature: Synlett, 1305 (2001)./n
Dichiarazioni di rischio (UE): H301-H310-H330-H315-H318-H361-H335
Toxic if swallowed. Fatal in contact with skin. Fatal if inhaled. Causes skin irritation. Causes serious eye damage. Suspected of damaging fertility or the unborn child. May cause respiratory irritation.
Dichiarazioni precauzionali: P301+P310a-P304+P340-P305+P351+P338-P320-P330-P405-P501a
IF SWALLOWED: IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Specific treatment is urgent (see label). Rinse mouth. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.