Synthesis of a Pentacene-Type Silaborin via Double Dehydrogenative Cyclization of 1,4-Diboryl-2,5-disilylbenzene
作者:Tatsuya Hirofuji、Toshiaki Ikeda、Takeharu Haino、Yohsuke Yamamoto、Atsushi Kawachi
DOI:10.1002/chem.201600785
日期:2016.7.4
prepared by stepwise introduction of a silyl group and a boryl group to a benzene ring starting from 1,4‐dibromobenzene. Double cyclization of 4 proceeds by a H‐Mes exchange and a B‐H/C‐H dehydrogenative condensation to afford pentacene‐type silaborin 5. X‐ray crystal structure analysis reveals that 5 adopts a bent structure rather than a planar one. UV/Vis spectra and DFT calculations for 5 reveal a
已经合成了一种新的并五苯型硅铝蛋白,其中三个苯环被硅和硼原子桥接,并通过NMR光谱学和X射线晶体学分析对其进行了表征。前体1,4-双(dimesitylboryl)-2,5-双(苯基甲硅烷基)苯(4)是通过从1,4-二溴苯开始逐步将甲硅烷基和硼烷基引入苯环而制得的。的双环化4个由H-的Mes交换和一个B-H / C-H脱氢缩合,得到的并五苯型silaborin前进5。X射线晶体结构分析表明5采用弯曲结构而不是平面结构。UV / Vis光谱和DFT计算为5与相应的蒽型3相比,发现LUMO能级降低了。