Frustrated Lewis pair (FLP) chemistry has undergone remarkable growth, among which rare-earth metal-based Lewis pairs have exhibited unique reactivity in recent years. Herein, treatment of the intramolecular Sc/P Lewis pair, i.e., (ArO)₂ScN(^tBu)PPh₂ (1, Ar = 2,6-^tBu₂-C₆H₃), with pyridotetrazole resulted in the formation of an FLP nitrene adduct with N₂ elimination, offering additional insights into the mechanism of transition-metal-catalyzed denitrogenative annulation of pyridotetrazole. Reactions of complex 1 with 1,3,5-triazine and benzo[c]cinnoline generated FLP-type products via Sc/P 1,2-addition to the CN bond and the NN bond, respectively. Furthermore, treatments of 1 with phenylacetylene, diazo, and azide compounds were also investigated, leading to the formation of a variety of metallacyclic complexes displaying typical FLP behaviors.

中文翻译：

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双子 Sc/P Lewis 对与吡啶四唑等的反应


挫折路易斯对 （FLP） 化学经历了显着的增长，其中基于稀土金属的路易斯对近年来表现出独特的反应性。在此，用吡啶四唑处理分子内 Sc/P Lewis 对，即 （ArO）₂ScN（^tBu）PPh₂ （1， Ar = 2,6-t Bu_{2-C 6}H₃） 导致形成带有 N₂ 的 FLP 硝烯加合物消除，为过渡金属催化的吡啶四唑脱氮环化机制提供了更多见解。配合物 1 与 1,3,5-三嗪和苯并[c]辛诺啉反应，分别通过 Sc/P 1,2-加成到 C N 键和 N N 键上生成 FLP 型产物。此外，还研究了苯乙炔、重氮和叠氮化物化合物对 1 的处理，导致形成多种表现出典型 FLP 行为的金属环络合物。