Catalyst shuttling enabled by a thermoresponsive polymeric ligand: facilitating efficient cross-couplings with continuously recyclable ppm levels of palladium
作者:Erfei Wang、Mao Chen
DOI:10.1039/c9sc02171j
日期:——
A polymeric monophosphine ligand WePhos has been synthesized and complexed with palladium(II) acetate [Pd(OAc)2] to generate a thermoresponsive pre-catalyst that can shuttle between water and organic phases, with the change being regulated by temperature. The structure of the polymeric ligand was confirmed with matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry
A new route towards dithienoquinazoline and benzo[f]thieno[3,2-h]quinazoline systems using Pd-catalyzed intramolecular cyclization under microwave irradiation
作者:Egor V. Verbitskiy、Gennady L. Rusinov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.3998/ark.5550190.p009.623
日期:——
A novel synthetic route to novel thienoacene systems bearing a fused pyrimidine ring is proposed. The commercially available 5-bromopyrimidine is used as the starting material to obtain various dithienoquinazoline and benzo[f]thieno[3,2-h]quinazoline systems through the Suzuki crosscoupling, nucleophilic aromatic substitution of hydrogen (the SNH reaction), and finally palladiumcatalyzed intramolecular
Copper Powder and Pd(II) Salts Triggered One-Pot Aromatic Halide Homocoupling via a Radical Pathway
作者:Chen Li、Yumeng Shi、Quan Chen、Kun Zhang、Guang Yang
DOI:10.1021/acs.joc.2c02717
日期:2023.2.17
this work, a bimetallic system was demonstrated, referring to stoichiometric copper powder in the presence of a catalytic amount of Pd(OAc)2, which contributed to delivering various symmetric/asymmetric (sp2)C–(sp2)C species. It has been proposed that the coupling process might be promoted via radicals produced by redox between Cu(0) and Pd(IV) species in the heating system. Increasing examples demonstrated
Synthesis and evaluation of antitubercular activity of fluorinated 5-aryl-4-(hetero)aryl substituted pyrimidines
作者:Egor V. Verbitskiy、Svetlana A. Baskakova、Marionella A. Kravchenko、Sergey N. Skornyakov、Gennady L. Rusinov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.1016/j.bmc.2016.06.020
日期:2016.8
substitution of hydrogen (SNH) reactions starting from commercially available 5-bromopyrimidine and their antitubercular activity against Mycobacterium tuberculosis H37Rv has been explored. The outcome of the study disclose that, some of the compounds have showed promising activity in micromolar concentration against Mycobacterium tuberculosis H37Rv, Mycobacterium avium, Mycobacterium terrae, and multidrug-resistant
Insight into Copper Catalysis: In Situ Formed Nano Cu<sub>2</sub>O in Suzuki–Miyaura Cross-Coupling of Aryl/Indolyl Boronates
作者:Ganapathy Ranjani、Rajagopal Nagarajan
DOI:10.1021/acs.orglett.7b01669
日期:2017.8.4
aryl and indole boronates has been explored in good to excellent yields. In situ generation of nano-Cu2O from CuCl2 under the reaction conditions has been discovered for the first time. The generality of the reaction was further demonstrated by the arylation of 5-iodopyrimidine, iodopyridines, iodobenzenes, and diiodobenzenes and resulted in good to moderate yields. Moreover, bisindole alkaloid Scalaridine