作者:Yang Zhao、Daniel J. Weix
DOI:10.1021/jacs.5b01909
日期:2015.3.11
The first enantioselective cross-electrophile coupling of aryl bromides with meso-epoxides to form trans-β-arylcycloalkanols is presented. The reaction is catalyzed by a combination of (bpy)NiCl2 and a chiral titanocene under reducing conditions. Yields range from 57 to 99% with 78–95% enantiomeric excess. The 30 examples include a variety of functional groups (ether, ester, ketone, nitrile, ketal
首次提出了芳基溴化物与内消旋环氧化物形成反式-β-芳基环烷醇的对映选择性交叉亲电偶联。该反应由(bpy)NiCl 2 和手性二茂钛在还原条件下的组合催化。产率范围为 57% 至 99%,对映体过量为 78-95%。这 30 个例子包括各种官能团(醚、酯、酮、腈、缩酮、三氟甲基、磺酰胺、磺酸酯)、芳基和乙烯基卤化物以及五至七元环。一氧化环辛烯向芳基[3.3.0]双环辛醇的转化强烈暗示了碳自由基的中介作用。