Palladium-Catalyzed Regioselective C–S Bond Cleavage of Thiophenes
摘要:
Herein, a Pd-catalyzed reaction of simple and diverse bromothiophenes with alkynes via regioselective C-S bond activation is reported. This provides a new approach to prepare sulfur-based heterocycles and fulvenes.
Palladium-catalysed direct arylation of thiophenes tolerant to silyl groups
作者:Lu Chen、Julien Roger、Christian Bruneau、Pierre H. Dixneuf、Henri Doucet
DOI:10.1039/c0cc04302h
日期:——
The palladium catalysed 5-arylation of 2-(trimethylsilyl)thiophene with aryl bromides via C–H bond functionalisation allows the synthesis of arylated silylthiophenes in only one step.
Palladium-Catalyzed Coupling Reactions of Bromothiophenes at the C−H Bond Adjacent to the Sulfur Atom with a New Activator System, AgNO<sub>3</sub>/KF
作者:Kei Kobayashi、Atsushi Sugie、Masabumi Takahashi、Kentaro Masui、Atsunori Mori
DOI:10.1021/ol052063y
日期:2005.10.1
Bromothiophene derivatives react with aryl iodides catalyzed by a palladium complex in the presence of a silver(I) nitrate/potassium fluoride system to induce coupling at the C-H bond, while the carbon-bromine bond is intact. The produced coupling product bearing the C-Br bond allows further palladium-catalyzed C-C bond-forming reactions in reasonable yields.
Electrochemical Bromination of Substituted Thiophenes in Batch and Continuous Flow
作者:Hao‐Kuan Lu、Ting Liu、Zhaojiang Shi、Hong Yan、Zhen Li、Ke‐Yin Ye
DOI:10.1002/ejoc.202200963
日期:2023.2.13
An electrochemicalbromination of substituted thiophenes and benzothiophenes from ammonium bromide was developed to produce 2-bromo thiophenes and 3-bromobenzo[b]thiophenes with moderate to excellent yields under both batch and continuous flow conditions.
Two cofacially oriented (oligo)thiophene units of 1,8-di(2-thienyl)-, 1,8-bis(5,2'-bithiophene-2-yl)-, and 1,8-bis(5,2':5',2"-terthiophene-2-yl)naphthalenes, which were synthesized starting from 1,8-dibromonaphthalene, interact with each other to stabilize the radical cations of these compounds, thus decreasing their CV oxidation potentials.
Palladium-Catalyzed Regioselective C–S Bond Cleavage of Thiophenes
Herein, a Pd-catalyzed reaction of simple and diverse bromothiophenes with alkynes via regioselective C-S bond activation is reported. This provides a new approach to prepare sulfur-based heterocycles and fulvenes.