dibenzo[g,p]chrysene (DBC) is described, involving the synthesis of multi-hydroxyl DBC derivatives. Addition of 16 equiv Br2 to a suspension of DBC in CH2Cl2 enables to singly construct a 2,7,10,15-tetrabromo-DBC. A lithium-bromine exchange event leads the corresponding silyl molecule, and the following oxidation formed a tetra-hydroxyl derivative. Its isomeric tetra-hydroxyl DBC as well as more congested octa-hydroxyl
Synthetic manipulation of the torsion angles in non-planar pi-conjugated dibenzo[g,p]chrysene (DBC) core was described. We prepared DBC scaffolds having four bromines at two bays, and found lithium-bromine exchange procedures enabled to create new DBC derivatives. Crystallographic analyses revealed the largest torsion angle of 57.4° in a tetra-sulfonyl-substituted DBC and the smallest torsion angle
描述了非平面 pi 共轭二苯并 [ g , p ] chrysene (DBC) 核心中扭转角的合成操作。我们在两个隔间制备了具有四种溴的 DBC 支架,并发现锂-溴交换程序能够产生新的 DBC 衍生物。晶体学分析显示,四磺酰基取代的 DBC 的最大扭转角为 57.4°,而双硅桥接的 DBC 的最小扭转角为 31.8°。借助计算方法,这些结果意味着骨架熔环可在 25.6° 范围内灵活移动。这项研究为我们开发具有畸变特征的功能性有机材料提供了知识基础。