Pd/Indanone-Based Ligands: An Efficient Catalyst System for Ullmann-Type, Suzuki–Miyaura, and Mizoroki–Heck Cross-Coupling Reactions with Aryl Tosylates and Aryl Halides
作者:Mohammed Waheed、Naseem Ahmed
DOI:10.1055/s-0036-1589058
日期:2017.9
efficiency. 2-Hydroxyindan-1-ones have been efficiently synthesized and successfully applied as ligands in Pd-catalyzed Ullmann type, Suzuki–Miyaura, and Mizoroki–Heckcross-couplingreactions with aryl tosylates and aryl halides. The ligands are air- and moisture-stable and have shown high catalytic activity with Pd(OAc)2 in these cross-couplingreactions. The system tolerates a variety of functional
Coumarin based novel ligands in the Suzuki–Miyaura and Mizoroki–Heck cross-couplings under aqueous medium
作者:Mohammed Waheed、Naseem Ahmed
DOI:10.1016/j.tetlet.2016.07.028
日期:2016.8
Coumarin-based novel ligands (benzylidine-bis-(4-hydroxycoumarin)-diethylamines) were easily synthesized using 4-hydroxycoumarin, aromatic aldehydes, and diethylamine. The ionic ligand structure was established by X-ray study. They are air and moisture stable ligands and have shown highly efficient catalytic activity with Pd(OAc)2 (0.1 mol % loading) in the Suzuki–Miyaura and (0.3 mol % loading) in
We describe a general and efficient transition-metal free C–C bond cross-coupling of (hetero)arylethers and diarylmethanes via C(sp2)–O bond cleavage. The coupling reactions mediated by KHMDS proceeded well with high efficiency, broad substrate scope, and good functional group tolerance. The robustness and practicability of this protocol also have been demonstrated by easy gram-scale preparation and
Pd(OAc)<sub>2</sub>-Catalyzed Alkoxylation of Arylnitriles via sp<sup>2</sup> C–H Bond Activation Using Cyano as the Directing Group
作者:Wu Li、Peipei Sun
DOI:10.1021/jo301384r
日期:2012.9.21
A Pd(OAc)(2)-catalyzed ortho-alkoxylation of arylnitrile was described. Using cyano as a directing group, the aromatic C-H bond can be functionalized efficiently to generate ortho-alkoxylated arylnitrile derivatives with moderate yields. The optimal reaction conditions were identified after examining various factors such as oxidant, solvent, and reaction temperature. The method was compatible to the arylnitriles with either electron-withdrawing or electron-donating groups.