在存在有机(无金属)可循环使用的氧化剂(例如DDQ或CA / H +)的情况下,具有各种取代基的咔唑的氧化C-C偶联反应证明了该化合物可与联咔唑区域异构体接触。对不同取代的咔唑进行了研究,以显示区域选择性的区别(3,3'-与1,3'-联咔唑)和在氧化偶联中基于空间和电子学的偏好。最终,已经找到(证明)了涉及咔唑自由基阳离子的机理,并在紫外可见近红外吸收和EPR光谱结果的基础上提出了一种机理。这项研究强调了以有效方式对一系列联咔唑进行战略化学制备的方法。
Mild and General Palladium-Catalyzed Synthesis of Methyl Aryl Ethers Enabled by the Use of a Palladacycle Precatalyst
作者:Chi Wai Cheung、Stephen L. Buchwald
DOI:10.1021/ol401796v
日期:2013.8.2
A general method for the Pd-catalyzed coupling of methanol with (hetero)aryl halides is described. The reactions proceed under mildconditions with a wide range of aryl and heteroaryl halides to give methyl aryl ethers in high yield.
Highly Regioselective Synthesis of Indenocarbazolones via Palladium-Catalyzed Intramolecular ortho Arylation
作者:Rajagopal Nagarajan、Devanga Sreenivas
DOI:10.1055/s-0031-1290660
日期:2012.4
An efficient protocol for the synthesis of indenocarbazolones through palladium-catalyzed intramolecular arylation in good yield with high regioselectivity under ligand-free conditions is reported. palladium catalysis - ortho arylation - indenocarbazolones - C-H activation
The present teachings relate to organic semiconductor formulations including an organic semiconducting compound in a liquid medium, where the liquid medium includes (1) a compound in liquid state that has electronic properties complementary to the electronic structure of the organic semiconducting compound and optionally (2) a solvent or solvent mixture for solubilizing the organic semiconducting compound. The present formulations can be used as inks in the fabrication of organic semiconductor devices.