Solution-Phase Synthesis of a Base-Free Benzoborirene and a Three-Dimensional Inorganic Analogue
作者:Hui Zhang、Junyi Wang、Weiguang Yang、Libo Xiang、Weicheng Sun、Wenbo Ming、Yinxin Li、Zhenyang Lin、Qing Ye
DOI:10.1021/jacs.0c06538
日期:2020.10.14
1,2-BR-1,2-C6H4 (7) and its three-dimensional inorganic analogue 1,2-BR-1,2-C2B10H10 (13) have been successfully synthesized by Cp2ZrBr2- and LiCl-elimination, respectively. The chloro analogue of the key interme-diate for the formation of benzoborirene 7 has been isolated and structurally characterized, thus suggesting the reaction pathway via benzyne Zr complex formation, B-Br/Cbenzyne-Zr σ-bond metathesis
无碱苯并硼烯1,2-BR-1,2-C6H4(7)及其三维无机类似物1,2-BR-1,2-C2B10H10(13)已通过Cp2ZrBr2-和LiCl-成功合成分别消除。形成苯并硼烯 7 的关键中间体的氯类似物已被分离和结构表征,从而表明反应途径通过苄基 Zr 配合物形成、B-Br/Cbenzyne-Zr σ-键复分解和 Cp2ZrBr2-消除/闭环过程。DFT计算证实了反应途径的合理性。此外,标题化合物对 Me2IPr (8) 具有相同的反应模式(即 1,3-甲硅烷基迁移),因此可以合成第一个碳硼烷取代的亚氨基硼烷 14。