We present an enantioselective synthesis of cis-fused tricyclic 1-tetralones via oxidative kinetic resolution in the presence of cumene hydroperoxide (CHP) and guanidine–bisurea bifunctional organocatalyst. This reaction affords the corresponding α-hydroxylation products together with unreacted tetralones in good to high enantioselectivity, with s values as high as 42. The reaction was successfully applied for the synthesis of the core structure of a kainoid derivative, 4-(2-methoxyphenyl)-2-carboxy-3-pyrrolidineacetic acid (MFPA).
我们提出了一种手性选择性合成顺式融合的三环1-四酮,该合成方法采用叔丁基过氧化氢(CHP)和胍-双脲双官能团有机催化剂存在下的氧化动力学分辨法。该反应以良好至高手性选择性的形式提供了相应的α-羟基化产物以及未反应的四酮,s值高达42。该反应成功地应用于合成kainoid衍生物的核心结构,即4-(2-甲氧基苯基)-2-羧基-3-吡咯烷乙酸(MFPA)。