Copper-Catalyzed Enantioselective 1,6-Boration of<i>para</i>-Quinone Methides and Efficient Transformation of<i>gem</i>-Diarylmethine Boronates to Triarylmethanes
作者:Yazhou Lou、Peng Cao、Tao Jia、Yongling Zhang、Min Wang、Jian Liao
DOI:10.1002/anie.201505926
日期:2015.10.5
Presented is the first enantioselective copper‐catalyzed 1,6‐conjugate addition of bis(pinacolato)diboron to para‐quinone methides. The reaction proceeds with excellent yields and good to excellent enantioselectivities, and provides an attractive approach to the construction of optically active gem‐diarylmehtine boronic esters. Additionally, the subsequent conversion of the derived potassium trifluoroborates
提出的是对(对苯醌)二硼在对醌甲基化物中铜的第一个对映选择性铜催化1,6-共轭加成反应。该反应以优异的收率和良好的至优异的对映选择性进行,并为构建光学活性的gem-diarylmehtine硼酸酯提供了一种有吸引力的方法。此外,随后将衍生的三氟硼酸钾转化为具有高对映体特异性的三芳基甲烷。