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.
Regiocontroled Pd-catalysed C5-arylation of 3-substituted thiophene derivatives using a bromo-substituent as blocking group
作者:Mariem Brahim、Hamed Ben Ammar、Jean-François Soulé、Henri Doucet
DOI:10.3762/bjoc.12.210
日期:——
C5-position via Pd-catalyseddirectarylation. With 1 mol % of a phosphine-free Pd catalyst, KOAc as the base and DMA as the solvent and various electron-deficient aryl bromides as aryl sources, C5-(hetero)arylated thiophenes were synthesized in moderate to high yields, without cleavage of the thienyl C-Br bond. Moreover, sequential direct thienyl C5-arylation followed by Pd-catalyseddirectarylation or Suzuki
Synthesis and characterization of a new photochromic alkylene sulfide derivative
作者:Asim A. Balakit、Keith Smith、Gamal A. El-Hiti
DOI:10.1080/17415993.2017.1413651
日期:2018.3.4
ABSTRACT A process has been developed for the synthesis of a newphotochromic alkylene sulfide derivative. The process involves the synthesis of an alkylene sulfide with terminal free amino groups and a novel unsymmetrical photochromic diarylperfluorocyclopentene containing an aldehyde group, which coupled together to produce the corresponding Schiff base. The structures of the products were confirmed