Enlarged acenothiadiazoles, which are easily prepared, display attractive optical and electrochemical properties. The annulation of thiadiazole to anthracene gives a stable material with optical properties similar to those of substituted pentacenes.
Use of Thiazyl Chlorides, Alkyl Carbamates, and Thionyl Chloride To Fuse 1,2,5-Thiadiazoles to Quinones and To Oxidize, Chlorinate, and Aminate Them
摘要:
Thiazyl chlorides in a simple one-step procedure fuse 1,2,5-thiadiazole rings to quinones. So do alkyl carbamates mixed with excess thionyl chloride and pyridine. Evidence is put forward to support the hypothesis that NSCl or a related thiazyl derivative is the reactive species that brings about the transformations. Selenoyl chloride mixed with an alkyl carbamate, pyridine, and quinones similarly gives 1,2,5-selenodiazoloquinones. Thionyl chloride in pyridine chlorinates quinones and oxidizes hydroquinones. 2,3-Dichloro-1,4-quinones with S4N4 or. with alkyl N-sulfinylcarbamates give 1,2,5-thiadiazoloquinones. Quinones and their 2 3-dichloro derivatives with TsNSO in pyridine give betaine derivatives of 2,3-diaminoquinones, which pyrrolidine converts into 2-amino-3(tosylamino)quinones. A unified set of mechanisms is presented that accounts for these transformations.
(Aza)Pentacenes Clipped into a Ring: Stabilization of Large (Aza)Acenes
作者:Lukas Ahrens、Olena Tverskoy、Svenja Weigold、Michael Ganschow、Frank Rominger、Jan Freudenberg、Uwe H. F. Bunz
DOI:10.1002/anie.202015348
日期:2021.4.19
bridged azapentacenes display superior photochemical, oxidative and thermal stabilities compared to azapentacenes protected by bis(TIPS‐ethynyl)‐substituents—clipping an azaacene into a large ring is a viable complement in stabilization.
Coronene-Containing N-Heteroarenes: 13 Rings in a Row
作者:Alexander H. Endres、Manuel Schaffroth、Fabian Paulus、Hilmar Reiss、Hubert Wadepohl、Frank Rominger、Roland Krämer、Uwe H. F. Bunz
DOI:10.1021/jacs.5b12642
日期:2016.2.17
We describe the modular synthesis of three novel large N-heteroarenes, containing 9, 11, and 13 annulated rings. This modular system features fused azaacene units to a coronene nucleus. We evaluate the optical and electronic properties and the solid-state packing of the targets. The electronic properties of the 13-ring N-heteroarene allow the fabrication of a proof-of-concept thin-film transistor.
Use of Thiazyl Chlorides, Alkyl Carbamates, and Thionyl Chloride To Fuse 1,2,5-Thiadiazoles to Quinones and To Oxidize, Chlorinate, and Aminate Them
作者:Shuhao Shi、Thomas J. Katz、Bingwei V. Yang、Longbin Liu
DOI:10.1021/jo00110a036
日期:1995.3
Thiazyl chlorides in a simple one-step procedure fuse 1,2,5-thiadiazole rings to quinones. So do alkyl carbamates mixed with excess thionyl chloride and pyridine. Evidence is put forward to support the hypothesis that NSCl or a related thiazyl derivative is the reactive species that brings about the transformations. Selenoyl chloride mixed with an alkyl carbamate, pyridine, and quinones similarly gives 1,2,5-selenodiazoloquinones. Thionyl chloride in pyridine chlorinates quinones and oxidizes hydroquinones. 2,3-Dichloro-1,4-quinones with S4N4 or. with alkyl N-sulfinylcarbamates give 1,2,5-thiadiazoloquinones. Quinones and their 2 3-dichloro derivatives with TsNSO in pyridine give betaine derivatives of 2,3-diaminoquinones, which pyrrolidine converts into 2-amino-3(tosylamino)quinones. A unified set of mechanisms is presented that accounts for these transformations.
Alkynylated Aceno[2,1,3]thiadiazoles
作者:Anthony Lucas Appleton、Shaobin Miao、Scott M. Brombosz、Nancy J. Berger、Stephen Barlow、Seth R. Marder、Brian M. Lawrence、Kenneth I. Hardcastle、Uwe H. F. Bunz
DOI:10.1021/ol902156x
日期:2009.11.19
Enlarged acenothiadiazoles, which are easily prepared, display attractive optical and electrochemical properties. The annulation of thiadiazole to anthracene gives a stable material with optical properties similar to those of substituted pentacenes.