New insights into the titanium-mediated enantioselective oxidation of fluorinated aryl benzyl sulfides and aryl phenacyl sulfides
作者:Maria Annunziata M. Capozzi、Vanni Frascaro、Gennaro Pescitelli、Cosimo Cardellicchio
DOI:10.1016/j.tet.2019.03.016
日期:2019.4
enantioenriched sulfoxides. Moreover, in a totally unexpected way, the new protocol was able to overcome another difficulty arose in another field of research, that is the enantioselectiveoxidation of a fluorinated aryl phenacyl sulfide. Also in this case, the complementarity of behavior is acting. Finally, this investigation gives new support to the attribution of configuration of sulfoxides with ECD
The Effect of the Fluorine Substitution on the Enantioselective Oxidation of Sulfides with Chiral Titanium Catalysts: A Combined Computational and Experimental Investigation
作者:Maria Annunziata M. Capozzi、Francesco Capitelli、Andrea Bottoni、Matteo Calvaresi、Cosimo Cardellicchio
DOI:10.1002/cctc.201200456
日期:2013.1
of the oxidation of various fluorinated aryl benzyl sulfides using tert‐butyl hydroperoxide (TBHP) in the presence of a complex of titanium and (S,S)‐hydrobenzoin are presented. As observed in previous studies for other aryl benzyl sulfides, the reaction leads to enantiopure sulfoxides (ee>98 %) in good isolated yields (81–96 %) except the case of pentafluorobenzyl pentafluorophenyl sulfide for which