Palladium N-heterocyclic carbene catalyzed expected and unexpected C–C and C–N functionalization reactions of 1-aryl-3-methyl-1H-pyrazol-5(4H)-ones
作者:Vishal B. Purohit、Sharad C. Karad、Kirit H. Patel、Dipak K. Raval
DOI:10.1039/c6ra22779a
日期:——
A palladium N-heterocyclic carbene [Pd(NHC)Cl2] complex of vitamin B1 developed earlier in our laboratory was successfully employed as an efficientcatalyst for the regioselective C–C and C–N functionalization reactions of 1-aryl-3-methyl-1H-pyrazol-5(4H)-ones 1a–b. The catalyst was attempted for the C–H arylation, acylation and alkoxylation of 1a–b using the respective coupling substrates such as
Iron-catalysed C–H ortho-arylation of edaravone, a promising monoamine oxidase-B inhibitor
作者:Soneela Asghar、Mattia Manzotti、Alexander Atkins、Sanita Tailor、Hazel A. Sparkes、Muhammad Saeed、Robin B. Bedford
DOI:10.1016/j.tet.2024.133983
日期:2024.5
Edaravone is a neuroactive drug that is currently used in the treatment of stroke patients and shows promise against a range of neurodegenerative processes including amyotrophic lateral sclerosis, Parkinson's disease and Alzheimer's disease. We show that iron-catalysedC–H functionalisation of edaravone and its derivatives can be exploited to generate a small library of 21 arylated edaravones, while