Rhodium-Catalyzed Addition of Aryl Boronic Acids to 2,2-Disubstituted Malononitriles
作者:Christian A. Malapit、Donald R. Caldwell、Irungu K. Luvaga、Jonathan T. Reeves、Ivan Volchkov、Nina C. Gonnella、Zhengxu S. Han、Carl A. Busacca、Amy R. Howell、Chris H. Senanayake
DOI:10.1002/anie.201703471
日期:2017.6.6
prepared through Rh‐catalyzed addition of aryl boronic acids to 2,2‐disubstituted malononitriles. In contrast to the previously described transnitrilative cyanation of aryl boronic acids with dialkylmalononitriles, the present reaction avoids retro‐Thorpe collapse of the intermediate addition product through the use of a milder base. The reaction was amenable to a variety of aryl boronic acids and disubstituted
通过在2,2-二取代的丙二腈中Rh催化芳基硼酸的加成反应,制得了在2位带有季碳的β-乙腈。与之前描述的芳基硼酸与二烷基丙二腈的反硝化氰化相反,本反应通过使用较温和的碱避免了中间体加成产物的逆索普-索普塌缩。该反应适用于各种芳基硼酸和二取代的丙二腈,可提供多种β-乙腈。该产品可以进一步衍生为有价值的手性α,通过加成反应成相应的α二取代的β氨基腈ñ -叔-butanesulfinyl亚胺。