Benzenesulfonyl chlorides: new reagents for access to alternative regioisomers in palladium-catalysed direct arylations of thiophenes
作者:Kedong Yuan、Henri Doucet
DOI:10.1039/c3sc52420e
日期:——
The palladium-catalysedcoupling of benzenesulfonylchlorides with thiophene derivatives allows regioselective access to β-arylated thiophenes. The reaction proceeds with easily accessible catalyst, base and substrates, without oxidant or ligand and tolerates a variety of substituents on both the benzene and thiophene moieties.
homogeneous palladium catalysts. Better yields were obtained with electron-deficient benzenesulfonylchlorides than with the electron-rich ones. Notably, useful substituents such as bromo or iodo on the benzenesulfonylchloride were tolerated, as no cleavage of the C-Br or C-I bonds was observed under these conditions. The use of Pd/C presents several advantages compared to the previously employed homogeneous
Eco-Friendly Solvents for Palladium-Catalyzed Desulfitative CH Bond Arylation of Heteroarenes
作者:Anoir Hfaiedh、Kedong Yuan、Hamed Ben Ammar、Bechir Ben Hassine、Jean-François Soulé、Henri Doucet
DOI:10.1002/cssc.201403429
日期:2015.5.22
Herein, we report the Pd‐catalyzed regioselective direct arylation of heteroarenes in which benzenesulfonyl chlorides are used as coupling partners through a desulfitative cross‐coupling that can be performed in diethyl carbonate (DEC) or cyclopentyl methyl ether (CPME) as green and renewable solvents or even in neat conditions instead of dioxane or dimethylacetamide (DMA). Under these solvent conditions
Nitrogen-containing heterocyclic compound and use thereof
申请人:Ikeura Yoshinori
公开号:US20090156572A1
公开(公告)日:2009-06-18
The present invention relates to a compound represented by the formula
wherein ring A is a nitrogen-containing heterocycle optionally further having substituent(s), ring B is an aromatic ring optionally having substituent(s), ring C is a cyclic group optionally having substituent(s), R
1
is a hydrogen atom, a hydrocarbon group optionally having substituent(s), an acyl group, a heterocyclic group optionally having substituent(s) or an amino group optionally having substituent(s), R
2
is an optionally halogenated C
1-6
alkyl group, m and n are each an integer of 0 to 5, m+n is an integer of 2 to 5, and
is a single bond or a double bond, or a salt thereof and the like. Since the compound has a superior tachykinin receptor antagonistic action, and is useful as an agent for the prophylaxis or treatment of various diseases such as lower urinary tract diseases, gastrointestinal diseases, central nervous system diseases and the like.