Beschreibung:
<jats:title>Abstract</jats:title><jats:p>A simple and efficient catalytic procedure for the oxidation of bulky (preferably aryl benzyl substituted) thioethers with hydrogen peroxide in good to high yields and enantioselectivities (up to 98.5 % <jats:italic>ee</jats:italic>) is reported. The high optical yields are achieved in a tandem stereoconvergent enantioselective oxidation and kinetic resolution process. A reasonable balance between the sulfoxide yield and enantioselectivity could be found by varying the concentration and temperature. An improved synthesis of the titanium–salan catalysts for the preparation of a more stereoselective catalyst is reported.</jats:p>