A Zwitterionic Palladium(II) Complex as a Precatalyst for Neat-Water-Mediated Cross-Coupling Reactions of Heteroaryl, Benzyl, and Aryl Acid Chlorides with Organoboron Reagents
A zwitterionic palladium(II) complex has been found to be an efficient catalyst for Suzuki–Miyaura cross‐coupling reactions of aryl and heteroaryl organoboron reagents with various heteroaryl chlorides, aryl‐ and heteroarylmethyl chlorides, and aryl acid chlorides in neat water.
Mono and Dinuclear Palladium Pincer Complexes of NNSe Ligand as a Catalyst for Decarboxylative Direct C−H Heteroarylation of (Hetero)arenes
作者:Sohan Singh、Vikki N. Shinde、Sunil Kumar、Neha Meena、Nattamai Bhuvanesh、Krishnan Rangan、Anil Kumar、Hemant Joshi
DOI:10.1002/asia.202300628
日期:2023.10.4
NNSe pincerligand and its palladium pincercomplexes. Surprisingly, the reactivity of the ligand toward the palladium precursor is base-dependent. In the presence of the Et3N base, a mononuclear pincercomplex was formed whereas in the absence of a base, a dinuclear pincercomplex was formed. The complexes were used as catalysts for decarboxylative direct C−H heteroarylation of (hetero)arenes. Among
Conditions for the palladium-catalyzed directarylation of a wide range of heterocycles with aryl bromides are reported. Those conditions employ a stoichiometric ratio of both coupling partners, as well as a substoichiometric quantity of pivalicacid, which results in significantly faster reactions. An evaluation of the influence of the nature of the aryl halide has also been carried out.