Asymmetric synthesis of Sulindac esters by enantioselective sulfoxidation in the presence of chiral titanium complexes
作者:Francesco Naso、Cosimo Cardellicchio、Francesco Affortunato、Maria Annunziata M. Capozzi
DOI:10.1016/j.tetasy.2006.12.002
日期:2006.12
anti-cancer therapy. The key step of the overall procedure was the enantioselective hydroperoxide oxidation of the Sulindac sulfide alkyl esters in the presence of chiral complexes of titanium with either (S,S)- or (R,R)-hydrobenzoin. Various reaction conditions were investigated in order to obtain the best balance between yield and enantioselectivity.
在制备舒林酸烷基酯时,获得了较高的ee值(高达94–96%ee)和中等的孤立产率(48–50%)。这些分子是舒林酸的简单直接的前体,舒林酸是一种抗炎药,最近也已在抗癌疗法中进行了研究。整个过程的关键步骤是在钛与(S,S)-或(R,R)-氢安息香的手性络合物存在下,对舒林酸硫化物烷基酯的对映选择性氢过氧化物氧化。为了获得收率和对映选择性之间的最佳平衡,研究了各种反应条件。