Regioselective C−H Hydroarylation of Internal Alkynes with Arenecarboxylates: Carboxylates as Deciduous Directing Groups
作者:Liangbin Huang、Agostino Biafora、Guodong Zhang、Valentina Bragoni、Lukas J. Gooßen
DOI:10.1002/anie.201600894
日期:2016.6.6
catalytic [Ru(p‐cym)I2]2 and the base guanidine carbonate, benzoic acids react with internal alkynes to give the corresponding 2‐vinylbenzoic acids. This alkyne hydroarylation is generally applicable to diversely substituted electron‐rich and electron‐poor benzoic and acrylic acids. Aryl(alkyl)acetylenes react regioselectively with formation of the alkyl‐branched hydroarylation products, and propargylic
在催化[Ru(p- cym)I 2 ] 2的存在下与碱式碳酸胍,苯甲酸与内部炔烃反应,生成相应的2-乙烯基苯甲酸。这种炔烃的氢芳基化反应通常适用于各种取代的富电子和贫电子的苯甲酸和丙烯酸。芳基(烷基)乙炔区域选择性地反应,形成烷基支链的氢芳基化产物,炔丙醇转化为γ-亚烷基-δ-内酯。加氢芳基化反应也可以用不同选择的催化剂和反应条件进行脱羧反应。该反应变体不会通过2-乙烯基苯甲酸的中间形成来进行,从而打开了区域选择性,废物最少化的乙烯基芳烃的合成入口。