作者:Sebastien Meiries、Gaëtan Le Duc、Anthony Chartoire、Alba Collado、Klaus Speck、Kasun S. Athukorala Arachchige、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1002/chem.201302471
日期:2013.12.16
6‐di(3‐pentyl)phenyl)imidazol‐2‐ylidene) NHCs are the simplest and already known congeners. The synthetic route was successfully used for the preparation of three members of the ITent family: IPent (N,N′‐bis(2,6‐di(3‐pentyl)phenyl)imidazol‐2‐ylidene), IHept (N,N′‐bis(2,6‐di(4‐heptyl)phenyl)imidazol‐2‐ylidene) and INon (N,N′‐bis(2,6‐di(5‐nonyl)phenyl)imidazol‐2‐ylidene). The electronic and steric properties
一个直接的和新的N-杂环卡宾(NHC的)可扩展的八步合成已经从便宜和容易获得2-硝基开发米二甲苯。该过程可以制备一类新的NHC,即ITent(称为“帐篷”的“帐篷”),其中著名的IMes(N,N′-双(2,4,6-三甲基苯基)咪唑-2-亚烷基),IPr(N,N'-双(2,6-二(2-丙基)苯基)咪唑-2-亚基)和IPent(N,N'-双(2,6-二(3-戊基)苯基)咪唑-2-亚基NHC是最简单且已知的同类物。该合成路线已成功用于准备ITent系列的三个成员:IPent(N,N′-双(2,6-二(3-戊基)苯基)咪唑-2-亚基),IHept(N,N′-双(2,6-二(4-庚基)苯基)咪唑-2-亚基)和INon(N,N'-双(2,6-二(5-壬基)苯基)咪唑-2-亚基)。通过制备镍和钯配合物,研究了每种NHC的电子和空间特性。最后,研究了这些新的ITent配体在Pd催化的Suzuki-Miya