Facile synthesis of 2H-indazole derivatives starting from the Baylis–Hillman adducts of 2-cyclohexen-1-one
摘要:
Facile synthetic method of 2H-indazole derivatives was developed involving DDQ oxidation of pyrazoles, which were prepared starting from the Baylis-Hillman adducts of 2-cyclohexen-1-one. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis of hydrogenated indazole derivatives starting with α,β-unsaturated ketones and hydrazine derivatives
摘要:
The reaction of hydrazine derivatives with alpha,beta-unsaturated ketones, such as cyclohexenyl(phenyl) methanone and (E)-2-benzylidenecyclohexanone, were investigated.The reaction between methylhydrazine and e.g., cyclohexenyl(phenyl)methanone was particularly interesting as 3a,4,5,6,7,7a-hexahydro-1-methyl-3-phenyl-1H-indazole was obtained as the major product together with 4,5,6,7-tetrahydro-2-methyl-3-phenyl-2H-indazole as a minor product. (C) 2009 Elsevier Ltd. All rights reserved.
1,3-Diarylcycloalkanopyrazoles and diphenyl hydrazides as selective inhibitors of cyclooxygenase-2
作者:Zhihua Sui、Jihua Guan、Michael P. Ferro、Kathy McCoy、Michael P. Wachter、William V. Murray、Monica Singer、Michele Steber、Dave M. Ritchie、Dennis C. Argentieri
DOI:10.1016/s0960-894x(00)00041-x
日期:2000.3
cyclooxygenase-2. The 1,3-diaryl substitution pattern of the pyrazole ring in 1 differentiates these compounds from most of the known selective COX-2 inhibitors that contain two aryl rings at the adjacent positions on a heterocyclic or a phenylring. Similarly, the two phenylrings in 2 are also separated by three atoms. SAR of both phenylrings in 1 and 2, and the aliphatic ring in 1 will be discussed.
Microwave-assisted synthesis, biological assessment, and molecular modeling of aza-heterocycles: Potential inhibitory capacity of cholinergic enzymes to Alzheimer's disease
作者:Efraín Polo、Luis Prent-Peñaloza、Yeray A. Rodríguez Núñez、Lady Valdés-Salas、Jorge Trilleras、Juan Ramos、José A. Henao、Antonio Galdámez、Alejandro Morales-Bayuelo、Margarita Gutiérrez
DOI:10.1016/j.molstruc.2020.129307
日期:2021.1
Abstract A highly regioselective solvent-free microwave-assisted synthesis of pyrazoles and tetrahydroindazoles based on the condensation of 1,3-diketones with arylhydrazines is described. Compounds were evaluated as cholinesterase inhibitors in order to identify an alternative treatment for Alzheimer's disease. All compounds displayed moderated acetylcholinesterase inhibitory activity and most of
Palladium-Catalyzed Coupling of Pyrazole Triflates with Arylboronic Acids
作者:Curt A. Dvorak、Dale A. Rudolph、Sandy Ma、Nicholas I. Carruthers
DOI:10.1021/jo0477897
日期:2005.5.1
A general protocol for the palladium-mediated Suzuki coupling reaction of pyrazole triflates and aryl boronic acids has been developed. The use of additional dppf ligand was determined to increase product yields allowing for the use of a broad range of reaction substrates.
Bauer, Annales de Chimie (Cachan, France), 1914, vol. <9> 1, p. 408
作者:Bauer
DOI:——
日期:——
Synthesis, docking studies and anti-inflammatory activity of 4,5,6,7-tetrahydro-2H-indazole derivatives
A regioselective synthesis of 2,3-disubstituted tetrahydro-2H-indazols, mediated by alpha-zirconium sulfopherylphosphonate-methanephosphonate, was reported. Docking studies into the catalytic site of COX-2 were used to identify potential antiinflammatory lead compounds. Two lead derivatives were chosen endowed with good binding energies and good ADME profiling. The biological in vivo evaluation of these compounds in two different experimental models (Freund's adjuvant-induced arthritis and carrageenan-induced oedema) proved the presence of anti-inflammatory activity. Noteworthy, both compounds evidenced the lack of any gastric injury even at high doses in gastric ulcerogenic assays. (c) 2007 Elsevier Ltd. All rights reserved.