Guo Rui, Zhang Xin, Li Tong, Li Qianli, Ruiz David A, Liu Liu Leo, Tung Chen-Ho, Kong Lingbing
School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 P. R. China
Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China.
Chem Sci. 2022 Jan 26;13(8):2303-2309. doi: 10.1039/d2sc00002d. eCollection 2022 Feb 23.
A cationic terminal iminoborane [MesN[triple bond, length as m-dash]B ← IPrMe][AlBr] (3[AlBr]) (Mes = 2,4,6-tri--butylphenyl and IPrMe = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene) has been synthesized and characterized. The employment of an aryl group and N-heterocyclic carbene (NHC) ligand enables 3[AlBr] to exhibit both B-centered Lewis acidity and BN multiple bond reactivities, thus allowing for the construction of tri-coordinate boron cations 5-12. More importantly, initial reactions involving coordination, addition, and [2 + 3] cycloadditions have been observed for the cationic iminoborane, demonstrating the potential to build numerous organoboron species several synthetic routes.
一种阳离子型末端亚氨基硼烷[MesN≡B←IPrMe][AlBr] (3[AlBr])（Mes = 2,4,6-三叔丁基苯基，IPrMe = 1,3-二异丙基-4,5-二甲基咪唑-2-亚基）已被合成并表征。芳基和N-杂环卡宾（NHC）配体的使用使3[AlBr]既能表现出以硼为中心的路易斯酸性，又能表现出硼氮多重键反应性，从而能够构建三配位硼阳离子5 - 12。更重要的是，已观察到阳离子型亚氨基硼烷发生了涉及配位、加成和[2 + 3]环加成的初始反应，这表明通过多种合成路线构建众多有机硼物种的潜力。
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