Aromaticity transfer in an annulated 1,4,2-diazaborole: facile access to Cs symmetric 1,4,2,5-diazadiborinines
作者:Vignesh Pattathil、Conor Pranckevicius
DOI:10.1039/d4cc02414a
日期:——
Dearomatization of the flanking rings is shown to increase reactivity of this heterocycle in the form of a B-centred alkylation with MeI. Its reaction with hydrido-, fluoro-, and chloro-boranes reveal an unprecedented ring expansion reaction to form a diverse family of B2C2N2 heterocycles, reduction of which allows facile access to the first examples of Cs symmetric 1,4,2,5-diazadiborinines. DFT calculations
通过双齿吡啶基卡宾配体与 MesBBr 2反应,然后还原,可以轻松获得三环环状 1,4,2-二氮杂硼杂环戊二烯。侧翼环的脱芳构化以与 MeI 进行的以 B 为中心的烷基化形式增加了该杂环的反应性。它与氢硼烷、氟硼烷和氯硼烷的反应揭示了前所未有的扩环反应,形成了多种 B 2 C 2 N 2杂环族,其还原可以轻松获得C s对称 1,4 的第一个例子,2,5-二氮杂二硼烷。 DFT 计算揭示了还原物质的电子结构,并提供了对所观察到的环膨胀的机制方面的深入了解。