作者:Priyanka Gupta、Jan-Erik Siewert、Tim Wellnitz、Malte Fischer、Wolgang Baumann、Torsten Beweries、Christian Hering-Junghans
DOI:10.1039/d1dt00071c
日期:——
Phospha–Wittig reagents, RPPMe3 (R = Mes* 2,4,6-tBu3-C6H2; MesTer 2,6-(2,4,6-Me3C6H2)-C6H3; DipTer 2,6-(2,6-iPr2C6H3)-C6H3), can be considered as phosphine-stabilized phosphinidenes. In this study we show that PMe3 can be displaced by NHCs or NHOs. Interestingly, phosphinidene-like reactivity results in a subsequent C(sp2)–H activation of the exocyclic CH2 group in NHOs. This concept was further extended
Phospha–Wittig试剂RPPMe 3(R = Mes * 2,4,6- t Bu 3 -C 6 H 2;Mes Ter 2,6-(2,4,6-Me 3 C 6 H 2)-C 6 H 3;Dip Ter 2,6-(2,6-iPr 2 C 6 H 3)-C 6 H 3),可以被认为是膦稳定的次膦酸酯。在这项研究中,我们表明PMe 3可以被NHC或NHO取代。有趣的是,类似次膦的反应性会导致随后的C(sp 2)– NHOs中环外CH 2基团的H活化。该概念进一步扩展到烯丙基加成的NHO,产生了膦取代的烯丙基。