Ferrocenyl palladacycles derived from unsymmetrical pincer-type ligands: evidence of Pd(0) nanoparticle generation during the Suzuki–Miyaura reaction and applications in the direct arylation of thiazoles and isoxazoles
作者:Ankur Maji、Anshu Singh、Aurobinda Mohanty、Pradip K. Maji、Kaushik Ghosh
DOI:10.1039/c9dt03465j
日期:——
Mechanistic investigation authenticated the generation of Pd(0) nanoparticles during the catalytic cycle and the nanoparticles were characterized by XPS, SEM and TEM analysis. Direct C–H arylation of thiazole and isoxazole derivatives employing these ferrocenyl-palladacycle complexes was examined. The reaction model for the arylation reaction implicating the in situ generation of Pd(0) nanoparticles was
[EN] HETEROARYL SUBSTITUTED SPIROCYCLIC SULFAMIDES FOR INHIBITION OF GAMMA SECRETASE<br/>[FR] SULFAMIDES SPIROCYCLIQUES SUBSTITUES PAR HETEROARYLE UTILISES COMME INHIBITEURS DE LA GAMMA-SECRETASE
申请人:MERCK SHARP & DOHME
公开号:WO2003093252A1
公开(公告)日:2003-11-13
Compounds of formula I are disclosed: in which X is a 5-membered heteroaryl ring and R is as defined herein. The compounds are inhibitors of the processing of APP by gamma-secretase, and hence are useful in the treatment or prevention of Alzheimer's disease.
Synthesis of 3-Substituted 2-Arylpyridines via Cu/Pd-Catalyzed Decarboxylative Cross-Coupling of Picolinic Acids with (Hetero)Aryl Halides
作者:Dagmar Hackenberger、Philip Weber、David C. Blakemore、Lukas J. Goossen
DOI:10.1021/acs.joc.7b00046
日期:2017.4.7
A decarboxylativecross-coupling of 3-substituted picolinic acids with (hetero)arylhalides is presented. In the presence of catalytic Cu2O and Pd(1,5-cyclooctadiene)Cl2 with 2-dicyclohexylphosphino-2′-(N,N-dimethylamino)biphenyl as the ligand, both electron-rich and electron-deficient aryl bromides and chlorides as well as heteroaryl bromides were successfully coupled with various picolinate salts
A convenient phosphine-free palladium-catalyzed direct arylation of thiazole under mild aerobic conditions
作者:Xiao-Xi He、Yan-Fang Li、Ju Huang、Dong-Sheng Shen、Feng-Shou Liu
DOI:10.1016/j.jorganchem.2015.12.009
日期:2016.2
A series of bulky amine palladium complexes [(Ar-NH2)2PdCl2]} were synthesized and characterized. The catalytic activity of the palladium complexes was evaluated via the direct C–H arylation of thiazoles with aryl bromides in aerobic conditions at 80–100 °C. Under the optimal conditions, 0.5–0.05 mol% of the bulky palladium complexes were found to be very efficient and produced the desired cross-coupling
Direct C-H bond (Hetero)arylation of thiazole derivatives at 5-position catalyzed by N-heterocyclic carbene palladium complexes at low catalyst loadings under aerobic conditions
synthesis of 5-(hetero)arylated thiazole derivatives via an N-heterocyclic carbene palladium (Pd-NHC) complex catalyzed directC-Harylation reaction. Utilization of this methodology, the arylation of substituted thiazoles with (hetero)aryl bromides efficiently proceeded at low catalyst loading (0.1–0.05 mol%) and under aerobic conditions. A variety of (hetero)aryl bromides, even some strongly deactivated