A Combined Theoretical and Experimental Investigation on the Enantioselective Oxidation of Aryl Benzyl Sulfides in the Presence of a Chiral Titanium Catalyst
作者:Francesco Naso、Maria Annunziata M. Capozzi、Andrea Bottoni、Matteo Calvaresi、Valerio Bertolasi、Francesco Capitelli、Cosimo Cardellicchio
DOI:10.1002/chem.200902110
日期:2009.12.14
An experimental investigation of the enantioselective oxidation of aryl benzyl sulfides by tert‐butyl hydroperoxide in the presence of a titanium/hydrobenzoin catalyst has shown that these sulfides are ideal substrates for this catalytic system, with negligible interference by the substituents on the aryl groups. A reaction mechanism based on DFT computations has been proposed. The DFT MPWB1K functional
在钛/氢安息香催化剂存在下,叔丁基氢过氧化物对芳基苄基硫醚的对映选择性氧化的实验研究表明,这些硫化物是该催化体系的理想底物,芳基上的取代基对干扰的影响可忽略不计。提出了一种基于DFT计算的反应机理。DFT MPWB1K官能团用于理论研究中,以解决弱氢键和π相互作用的问题。所计算的反应曲线说明了实验观察到的对映选择性,这是由反应第一阶段的热力学确定的。给出了沿着观察到的立体化学路径推动反应的氢键和π相互作用的详细讨论。