Rapid and Efficient Microwave-Assisted Synthesis of Aryl Aminobenzophenones Using Pd-Catalyzed Amination
摘要:
Substituted aryl aminobenzophenone p38 MAP kinase inhibitors were synthesized in good to excellent yields using palladium-catalyzed aryl amination under conditions of microwave irradiation. Various ligands have been screened, and the reaction conditions were optimized. These coupling reactions are suitable for various anilines and aryl bromides that bear a variety of functional groups. Some leaving groups (iodides, chlorides, triflates, and tosylates) other than bromides have also been investigated. By this method, a large number of aryl aminobenzophenone p38 MAP kinase inhibitors were prepared in short order.
Aminations of Aryl Bromides in Water at Room Temperature
作者:Bruce H. Lipshutz、David W. Chung、Brian Rich
DOI:10.1002/adsc.200900323
日期:2009.8
Unsymmetrical di- and triarylamines can be formed under green chemistry conditions, taking advantage of micellar catalysis leading to palladium-catalyzed aminations at ambient temperatures in water as the only medium.
Sodium Butylated Hydroxytoluene: A Functional Group Tolerant, Eco‐Friendly Base for Solvent‐Free, Pd‐Catalysed Amination
作者:Volodymyr Semeniuchenko、Wilfried M. Braje、Michael G. Organ
DOI:10.1002/chem.202101617
日期:2021.9
NaBHT (sodium 2,6-di-tert-butyl-4-methylphenolate), a strong, but hindered and lipophilic base, has been effectively paired with similarly lipophilic, high-reactivity Pd-NHC (N-heterocyclic carbene) catalysts to produce an ideal combination for performing solvent-free (melt) cross-coupling amination. The mild nucleophilicity of NaBHT, coupled with the anti-oxidant properties of its conjugate acid byproduct
Stable Nickel(0) Phosphites as Catalysts for CN Cross-Coupling Reactions
作者:Sven S. Kampmann、Alexandre N. Sobolev、George A. Koutsantonis、Scott G. Stewart
DOI:10.1002/adsc.201400201
日期:2014.6.16
phosphite‐based catalysts for use in the CNcross‐couplingreaction. The combination of nickel tetrakis(triphenyl phosphite) Ni[P(OPh)3]4} and 1,1′‐bis(diphenylphosphino)ferrocene (dppf), and in particular a newly developed catalyst (dppf)Ni[P(OPh)3]2, were found to be extremely effective in catalyzing a range of amination reactions of anilines and amines with aryl chlorides. This new catalyst system offers
Selective Monoarylation of Primary Anilines Catalyzed by Pd(dippf) and its Application in OLED Component Synthesis
作者:Matthias F. Grünberg、Fan Jia、Andreas Rivas-Nass、Lukas J. Gooßen
DOI:10.1002/adsc.201501160
日期:2016.5.19
Palladium 1,1′‐bis(diisopropylphosphino)‐ferrocene [Pd(dippf)] complexes were found to promote the monoarylation of primaryanilines with unprecedented selectivities. They also allow the sequential arylation of primaryanilines with two different aryl bromides in one pot. The reactions can be performed at low catalyst loadings (0.2 mol%) and high substrate concentrations. The synthetic utility of the
which involves the connection of two substituents through a benzene ring, is rarely recognized as a related idea. In this article, we present synthesis and physical properties, including their structure and reactivity of phenylogous amides. This amide mimetic unit is relatively stable and easily prepared by the Hartwig–Buchwald amination reaction. The effect of the resonance was examined by means