Utility of Organoboron Reagents in Arylation of Cyclopropanols via Chelated Pd(II) Catalysis: Chemoselective Access to β-Aryl Ketones
作者:Thangeswaran Ramar、Murugaiah A. M. Subbaiah、Andivelu Ilangovan
DOI:10.1021/acs.joc.0c00160
日期:2020.6.19
Organoborane reagents were investigated as coupling partners to cyclopropanol-derived β-ketone enolates in the presence of a chelated Pd(II) catalyst. Efficient coupling of a range of electronically and sterically diverse cyclopropanols and aryl/alkenyl boronic derivatives (39 examples, 65–94% yield) could be achieved with the generation of synthetically important β-aryl ketone intermediates in a chemoselective
在螯合的Pd(II)催化剂存在下,研究了有机硼烷试剂作为与环丙醇衍生的β-酮烯酸酯的偶联伙伴。通过化学选择性的方式生成具有重要合成意义的重要的β-芳基酮中间体,可以实现多种电子和空间上不同的环丙醇与芳基/烯基硼酸酯衍生物的高效偶联(39个实例,收率65-94%)。这种反应范式将芳基供体伙伴的范围扩大至均烯酸酯,允许开瓶条件,以水为助溶剂并制备与以往方法不同的含卤素β-芳基酮。这种螯合的Pd(II)催化作用似乎不同于Pd(0)途径,