Palladium(II)-Catalyzed Regio- and Stereoselective Hydroarylation of Diphenylphosphorylallenes with Arylboronic Acids in the Presence of Sodium Hydroxide and Oxygen
作者:Yang Chen、Dong-Mei Ma、Fei-Fei Ba、Jing Sun、Tian Liu、Lei Zhu、Ming-Dong Zhou
DOI:10.1002/adsc.201600160
日期:2016.9.1
The palladium(II)‐catalyzed hydroarylation of diphenylphosphorylallenes (via 1,2‐addition of the allenic double bond) with arylboronic acids in the presence of sodium hydroxide and oxygen is developed. The regioselectivities turn out to be well controlled, affording 2‐aryl‐3‐(diphenylphosphinyl)alkenes as the only product. Moreover, the stereoselectivities for reactions of γ‐substituted allenes can
在氢氧化钠和氧气的存在下,开发了钯(II)与芳基硼酸催化的二苯基磷杂环戊烷的加氢芳基化反应(通过烯丙基双键的1,2-加成反应)。区域选择性得到了很好的控制,只有2-芳基-3-(二苯基膦基)烯烃。此外,还可以很好地控制γ-取代的烯的反应的立体选择性,从而形成Z烯。该反应显示出高的取代基负载能力和对各种取代基的耐受性。提出了一种机理,包括芳基硼酸与卤化钯的金属转移,将1,2-烯丙基双键插入Pd-Ar键以及质子化以提供最终的氢芳基化产物。