Gold Catalysis Meets Materials Science – A New Approach to π‐Extended Indolocarbazoles
作者:Christoph M. Hendrich、Lukas M. Bongartz、Marvin T. Hoffmann、Ute Zschieschang、James W. Borchert、Désirée Sauter、Petra Krämer、Frank Rominger、Florian F. Mulks、Matthias Rudolph、Andreas Dreuw、Hagen Klauk、A. Stephen K. Hashmi
DOI:10.1002/adsc.202001123
日期:2021.1.19
Herein we describe a modular, convergent synthesis of substituted benzo[a]benzo[6,7]‐indolo[2,3‐h]carbazoles (BBICZs) using a bidirectional gold‐catalyzed cyclization reaction as a key step. A building block strategy enabled the easy variation of substituents at different positions of the core structure and a general analysis of substitution effects on the materials properties of the target compounds
本文中,我们描述取代的苯并的一个模块化的,汇集合成[一个]苯并[6,7]吲哚并[2,3- ħ ]咔唑使用双向金催化环化反应中的关键步骤(BBICZs)。构造策略使核心结构不同位置的取代基容易变化,并且对目标化合物的材料性质的取代作用进行了一般分析。对所有BBICZ均进行了充分表征,并通过实验和计算方法研究了它们的光学和电子性能。通过真空沉积制造了基于八种选定衍生物的有机薄膜晶体管,并测量了高达1 cm 2 / Vs的载流子迁移率。
Gold‐Catalyzed Synthesis of π‐Extended Carbazole‐Based Systems and their Application as Organic Semiconductors
作者:Christoph M. Hendrich、Valentin D. Hannibal、Lukas Eberle、Leif E. Hertwig、Ute Zschieschang、Frank Rominger、Matthias Rudolph、Hagen Klauk、A. Stephen K. Hashmi
DOI:10.1002/adsc.202001461
日期:2021.3.2
Herein we describe a gold‐catalyzed bidirectional synthesis of N‐heteropolycyclic compounds bearing carbazole moieties – namely π‐extended benzodicarbazoles and π‐extendedindolocarbazoles. Overall, four previously unknown core structures were synthesized. This approach is convergent, modular and the gold‐catalyzed key step comprises of a cascade reaction starting from stable di‐azido compounds. The
本文中,我们描述了带有咔唑基团的N杂环多环化合物(即π扩展的苯并二咔唑和π扩展的吲哚并咔唑)的金催化双向合成。总体而言,合成了四个以前未知的核心结构。这种方法是收敛的,模块化的,金催化的关键步骤包括从稳定的叠氮基化合物开始的级联反应。对获得的分子进行了充分表征,并研究了它们的光学和电子性质以及在真空沉积产生的有机薄膜晶体管中的性能。测得的载流子迁移率高达0.3 cm 2 / Vs。
BN‐Embedded Tetrabenzopentacene: A Pentacene Derivative with Improved Stability
Considerable efforts have been devoted to achieving stable acene derivatives for electronic applications; however, the instability is still a major issue for such derivatives. To achieve higher stability with minimum structural change, CC units in the acenes were replaced with isoelectronic BN units to produce a novel BN‐embeddedtetrabenzopentacene (BNTBP). BNTBP, with a planar structure, is highly stable
Efficient Synthesis of Dipyrrolobenzenes and Dipyrrolopyrazines <i>via</i> Bidirectional Gold Catalysis: a Combined Synthetic and Photophysical Study
作者:Robin Heckershoff、Tobias Schnitzer、Tim Diederich、Lukas Eberle、Petra Krämer、Frank Rominger、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1021/jacs.2c02394
日期:2022.5.11
New N-heterocyclic fluorophores are sought-after compounds for organic electronic devices. Here, we report on a straightforward synthesis to access meta/para-dipyrrolobenzenes and para-dipyrrolopyrazines in high yields using a bidirectional gold-catalyzed cyclization strategy. The versatility of our reaction protocol was showcased by preparing dipyrroloarenes with different substituents, various functional
Activation of bis(pinacolato)diboron with aromatic lithium amide promotes diboration of the proximal C–C triple bond, leading to BN-embedded aromatic compounds. In situ treatment of the initially generated spirocyclic borate intermediate with aqueous acid or organometallic reagents enables ligand installation on the endocyclic boron atom.