Syntheses and Properties of Nine-Ring-Fused Linear Thienoacenes
摘要:
pi-Extended nine-ring-fused linear thienoacenes 1a-c with internal thieno[3,2-b;4,5-b']dithiophene substructures were synthesized. Their optical and electrochemical properties were investigated. Thin-film transistor characteristics showed all compounds displayed high device reproducibility and nearly no dependence on substrate temperatures. The highest performance was observed for 1c-based devices with mobility up to 1.0 cm(2)/Vs and current on/off ratio of 10(7), whereas the maximum mobility was 0.5 cm(2)/Vs for 1b and 0.011 cm(2)/Vs for 1a.
Nickel-Catalyzed Reversible Functional Group Metathesis between Aryl Nitriles and Aryl Thioethers
作者:Tristan Delcaillau、Philip Boehm、Bill Morandi
DOI:10.1021/jacs.1c00529
日期:2021.3.17
We describe a new functional group metathesis between aryl nitriles and aryl thioethers. The catalytic system nickel/dcype is essential to achieve this fully reversible transformation in good to excellent yields. Furthermore, the cyanide- and thiol-free reaction shows high functional group tolerance and great efficiency for the late-stage derivatization of commercial molecules. Finally, synthetic applications
Palladium-Catalyzed Arylthiolation of Alkynes Enabled by Surmounting Competitive Dimerization of Alkynes
作者:Daisuke Uno、Keisuke Nogi、Hideki Yorimitsu
DOI:10.1021/acs.orglett.9b03056
日期:2019.10.18
By overcoming the unwanted catalytic dimerization of terminal alkynes, palladium-catalyzed carbothiolation of alkynes with heteroaryl sulfides has been accomplished to provide the corresponding β-heteroaryl alkenyl sulfides with high regio- and stereoselectivity. The key for the preferential arylthiolation is the use of arylsulfanyl segments, instead of alkylsulfanyl, for smooth C(heteroaryl)-SR1 bond
A thioether-directed Rh(III)-catalyzed C4 selective C–H alkenylation of indoles via the formation of 5-membered metallacycle intermediates is reported. This protocol allows a wide functional group compatibility and broad substrate scope. The directing group can be readily removed or transformed into other functional groups after the C–H functionalization event. The catalytic method is also applicable
据报道通过五元金属环中间体形成硫醚导向的Rh(III)催化的吲哚的C4选择性C–H链烯基化。该协议允许广泛的官能团兼容性和广泛的底物范围。在C–H官能化事件发生后,可以很容易地将导向基团除去或转化成其他官能团。该催化方法也适用于涉及苯并[ b ]噻吩和苯并[ b ]呋喃骨架的相关杂环体系。
Iridium‐Catalyzed Direct C4‐ and C7‐Selective Alkynylation of Indoles Using Sulfur‐Directing Groups
past century, and extensive studies have been conducted to establish practical synthetic methods for their derivatives. In particular, selective functionalization of the poorly reactive benzenoid core over the pyrrole ring has been a great challenge. Reported herein is an iridium‐catalyzed direct alkynylation of the indole C4‐ and C7‐positions with the assistance of sulfur directing groups. This transformation
Molecular Engineering of Chalcogen‐Embedded Anthanthrenes via
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‐Selective C−H Activation: Fine‐Tuning of Crystal Packing for Organic Field‐Effect Transistors
作者:Zheng Liu、Weiguo Han、Jingbo Lan、Lingyan Sun、Junbin Tang、Cheng Zhang、Jingsong You
DOI:10.1002/anie.202211412
日期:2023.1.16
RhCl3-catalyzed peri-selective C−H/C−H oxidative homo-coupling of 1-substituted naphthalenes is developed to access chalcogen-embedded anthanthrenes. S-embedded anthanthrene (PTT) exhibits hole transport with a mobility of 1.1 cm2 V−1 s−1. The transformation of p-type to n-type semiconductors is realized via the S-atom oxidation of PTT, and the resulting PTT-O4 shows electron transport with a mobility
开发了RhCl 3催化的 1-取代萘的近选择性 C−H/C−H 氧化均偶联反应,以获取硫属元素包埋的蒽蒽。S-嵌入蒽蒽 ( PTT ) 表现出迁移率为 1.1 cm 2 V -1 s -1的空穴传输。p 型到 n 型半导体的转变是通过 PTT 的 S 原子氧化实现的,生成的PTT-O4显示出迁移率为 0.022 cm 2 V -1 s -1的电子传输。