Enantioselective Sulfide Oxidation with H2O2: A Solid Phase and Array Approach for the Optimisation of Chiral Schiff Base-Vanadium Catalysts
作者:Béatrice Pelotier、Mike S. Anson、Ian B. Campbell、Simon J. F. Macdonald、Ghislaine Priem、Richard F. W. Jackson
DOI:10.1055/s-2002-32582
日期:——
Two libraries of chiral Schiff base ligands were synthesised and screened in the vanadium-catalysed oxidation of alkyl aryl sulfides with hydrogen peroxide as terminal oxidant. The vanadium-chiral Schiff base complex 10, readily prepared from 3,5-diiodo-salicylaldehyde and (S)-tert-leucinol, was found to be highly enantioselective. Optically active sulfoxides could thus be obtained in good yields with up to 97% ee.
在以过氧化氢为末端氧化剂的烷基芳基硫化物的钒催化氧化过程中,合成并筛选了两个手性希夫碱配体库。研究发现,由 3,5-二碘水杨醛和 (S)-tert-leucinol 容易制备的钒手性希夫碱复合物 10 具有很高的对映选择性。因此,可以获得光学活性氧化硫,产率高达 97%。