Über die synthese methoxylsubstituierter p-oligophenylene. 6. Mitteilung
摘要:
AbstractEs wird eine Reihe methoxylsubstituierter p‐Oligophenylene – von Biphenylderivaten bis zu solchen des Octiphenyls – durch die Addtion aromatischer metallorganischer Verbindungen an cyclische Ketone über hydroaromatische Zwischenstufen hergestellt. Die Verbindungen sind wesentlich besser löslich als die entsprechenden unsubstituierten p‐Oligophenylene.
Prospering the biphen[n]arenes family by tailoring reaction modules
作者:Kaidi Xu、Zhi-Yuan Zhang、Zihao Zhou、Chunju Li
DOI:10.1016/j.cclet.2021.09.096
日期:2022.5
investigation on the formation of biphen[n]arenes by tailoring reaction modules. Five new macrocyclic arenes and four oligomers were synthesized by the condensation of monomers possessing different multimethoxyphenyl reaction modules and paraformaldehyde. We proved that the number and sites of methoxy on reaction modules greatly affected the reaction activity, shape, and connection mode of macrocycles. Moreover
这里报道的是通过定制反应模块对联苯[ n ]芳烃形成的综合研究。通过具有不同多甲氧基苯基反应模块的单体与多聚甲醛缩合合成了五种新的大环芳烃和四种低聚物。我们证明了反应模块上甲氧基的数量和位点极大地影响了大环的反应活性、形状和连接方式。此外,单晶结构揭示了大环的三角形和马鞍形构型。该结果为设计新的大环芳烃提供了典型和基本的指导。
Single and Double Suzuki−Miyaura Couplings with Symmetric Dihalobenzenes
作者:David J. Sinclair、Michael S. Sherburn
DOI:10.1021/jo050105q
日期:2005.4.1
m- or p-diiodobenzene undergoes selective double coupling reactions with arylboronic acids and esters. Selectivity for double coupling over single coupling is remarkably strong: even with a diiodobenzene:monoboronic acid ratio of 10:1, the products of double coupling are formed in good yields. Steric hindrance and electronic influences of the boronic acid or ester, and reaction conditions do not appear to impact significantly upon the outcome of the reaction. In contrast, m- and p-dibromobenzenes undergo single couplings with aryl boronic acids with high selectivity.