Palladium-Catalyzed Benzylic CH Benzylation<i>via</i>Bis-Benzylpalladium(II) Complexes in Water: An Effective Pathway for the Direct Construction of<i>N</i>-(1,2-Diphenylethyl)anilines
作者:Hidemasa Hikawa、Kyoko Izumi、Yukari Ino、Shoko Kikkawa、Yuusaku Yokoyama、Isao Azumaya
DOI:10.1002/adsc.201401017
日期:2015.3.23
A strategy for the N‐benzylation/benzylic CH benzylation cascade of anilines by the π‐benzylpalladium system using a water‐soluble palladium(0)/sodium diphenylphosphinobenzene‐3‐sulfonate (TPPMS) catalyst and benzyl alcohol in water has been developed. This tandem process is devised as a novel and efficient synthetic route for N‐(1,2‐diphenylethyl)anilines. Benzylic CH activation of a mono‐N‐benzylated
一种用于策略Ñ -benzylation /苄ç ħ苄使用水溶性钯(0)/二苯基膦基苯钠-3-磺酸(TPPMS)由π共benzylpalladium系统苯胺的级联在水中的催化剂和苄醇已经开发。此串联过程被设计为N-(1,2-二苯乙基)苯胺的一种新颖而有效的合成途径。苄Ç 单h的活化Ñ -benzylated中间体与π-benzylpalladium(II)配合物,得到的双π苄基化钯(II)中间体。亲核η 1 -σ苄基阴离子配体攻击的亲电η 3-π-苄基配体产生二苄基化产物。单之间的分子间竞争Ñ -benzylaniline及其monodeuterated形式(在苄基组monodeuterated)与苄醇,得到一个KIE = 4.6,这表明Ç H键裂解参与了速率决定步骤。Hammett对各种取代邻氨基苯甲酸和单N-苄基苯胺苄基化速率常数的研究表明log(k X / k H)和各个取