作者:Chamila Manankandayalage、Daniel K. Unruh、Clemens Krempner
DOI:10.1002/chem.202005143
日期:2021.4.7
Si−H, B−H and C=O bonds. 4 and 5 deprotonated terminal alkynes and acetylene to form the zwitterionic borates 1‐(RC≡C‐BR2)‐2‐[(Me2N)2C=NH]‐C6H4 (R=Ph, H) and reacted with ammonia, BnNH2 and pyrrolidine, to generate the FLP adducts 1‐(R2HN→BR2)‐2‐[(Me2N)2C=NH]‐C6H4, where the N‐H functionality is activated by intramolecular H‐bond interactions. In addition, 5 was found to rapidly add across the double
分子内“逆”沮丧通式路易斯双(FLP信号)1-BR 2 -2 - [(ME 2 N)2 C = N] -C 6 H ^ 4(3 - 6)[BR 2 = BMES 2(3),BC 12 H 8,(4),BBN(5),BBNO(6)]的合成,并通过多核NMR光谱和X射线分析对其结构进行了表征。这些新型的预组织FLP,具有强碱性胍基单元,可通过邻位与弱Lewis酸性硼基部分刚性连接-亚苯基连接基,能够激活H,CH,NH,OH,SiH,BH和C = O键。4和5使末端炔烃和乙炔去质子化,形成两性离子硼酸盐1–(RC≡C‐BR 2)‐2 ‐ [(Me 2 N)2 C = NH] ‐C 6 H 4(R = Ph,H)和与氨,BnNH 2和吡咯烷反应生成FLP加合物1-(R 2 HN→BR 2)-2-[(Me 2 N)2 C = NH] -C 6 H 4,其中NH功能被分子内的H键相互作用激活。另外5据发现,H