磷叶立德试剂对氮杂环卡宾和氮杂环氧化物的反应活性。
Reactivity of phospha-Wittig reagents towards NHCs and NHOs.
作者信息
Gupta Priyanka, Siewert Jan-Erik, Wellnitz Tim, Fischer Malte, Baumann Wolgang, Beweries Torsten, Hering-Junghans Christian
机构信息
Leibniz-Institut für Katalyse e.V. (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
出版信息
Dalton Trans. 2021 Feb 9;50(5):1838-1844. doi: 10.1039/d1dt00071c.
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 to allyl-apended NHOs, which resulted in phosphine-substituted allyl species.
磷叶立德试剂RPPMe3（R = Mes* 2,4,6-三叔丁基苯基；MesTer 2,6-(2,4,6-三甲基苯基)-苯基；DipTer 2,6-(2,6-二异丙基苯基)-苯基）可被视为膦稳定的磷烯。在本研究中，我们表明三甲膦可被氮杂环卡宾（NHCs）或氮杂环氧化合物（NHOs）取代。有趣的是，类似磷烯的反应性导致NHOs中环外CH2基团随后发生C(sp2)-H活化。这一概念进一步扩展到烯丙基连接的NHOs，从而得到膦取代的烯丙基物种。
Zotero 插件