Copper(II)-Promoted C-C Bond Formation by Oxidative Coupling of Two C(sp<sup>3</sup>)-H Bonds Adjacent to Carbonyl Group to Construct 1,4-Diketones and Tetrasubstituted Furans
作者:Shuai Mao、Ya-Ru Gao、Shao-Liang Zhang、Dong-Dong Guo、Yong-Qiang Wang
DOI:10.1002/ejoc.201403274
日期:2015.2
The copper(II)-promoted C–C bond formation from the coupling of two C(sp3)–H bonds that are adjacent to a carbonylgroup was achieved. This protocol offers a simple and efficient approach to 2,3-disubstituted 1,4-diketones and tetrasubstituted furans. This method features a wide substrate scope and high functional group tolerance.
通过与羰基相邻的两个 C(sp3)-H 键的偶联,实现了铜 (II) 促进的 C-C 键形成。该协议为 2,3-二取代 1,4-二酮和四取代呋喃提供了一种简单有效的方法。该方法具有广泛的底物范围和高官能团耐受性。
Peripheral aryl-substituted pyrrole fluorophores for glassy blue-light-emitting diodes
作者:Wen-Jang Kuo、Ying-Hsiao Chen、Ru-Jong Jeng、Li-Hsin Chan、Wen-Peng Lin、Zhe-Ming Yang
DOI:10.1016/j.tet.2007.05.032
日期:2007.7
In this work, a series of aryl-substituted pyrrole analogues were synthesized. These pyrrole analogues emit violet to blue light. Fluorescence and amorphous glassy properties of these pyrrole analogues were induced by manipulating the peripheral aryl groups. These crowded peripheral aryl groups would effectively prevent the fluorophores from aggregation, resulting in higher quantum efficiency and a stable emission spectrum in the solid state. One of the aryl-substituted pyrrole analogues, namely NPANPy can be used as hole-transporting material or hole-transporting/emitting material. The devices would emit blue light when the fluorophore NPANPy acts as the hole-transporting/ emitting material. Their CIE coordinate is around (0.16, 0.14), whereas the maximum brightness can reach 4300-5000 cd m(-2). Apart from that, when the fluorophore was used only as the hole-transporting material, better device performances, especially in low current density, were found, as compared with the standard device. (C) 2007 Elsevier Ltd. All rights reserved.