在此,我们介绍了铜纳米颗粒-石墨氮化碳 (gC 3 N 4 ) 复合材料的有效合成,用于炔烃的高效 ( Z ) 选择性转移半氢化。应用基于荧光的高通量筛选方法来识别对原位生成的铜纳米粒子的最具协同作用的支持。在不存在gC 3 N 4的情况下,与铜纳米颗粒催化剂相比,衍生的Cu(OAc) 2 /gC 3 N 4系统的周转频率增加了五倍以上。各种炔烃被选择性地还原为相应的(Z)-烯烃在温和的反应条件下,提供高达 99% 的分离产率。目前的工作展示了一种简单且经济高效的铜纳米颗粒-gC 3 N 4复合材料的合成方法,用于炔烃的高效 ( Z ) 选择性转移半氢化。
Stereoselective Peterson Olefinations from Bench-Stable Reagents and<i>N</i>-Phenyl Imines
作者:Manas Das、Atul Manvar、Maïwenn Jacolot、Marco Blangetti、Roderick C. Jones、Donal F. O'Shea
DOI:10.1002/chem.201500475
日期:2015.6.8
The synthesis of bench‐stable α,α‐bis(trimethylsilyl)toluenes and tris(trimethylsilyl)methane is described and their use in stereoselective Peterson olefinations has been achieved with a wide substrate scope. Product stereoselectivity was poor with carbonyl electrophiles (E/Z ∼1:1 to 4:1) though this was significantly improved by employing the corresponding substituted N‐benzylideneaniline (up to 99:1)