A novel ligand-free palladium/copper-catalyzed Heck-type coupling reaction of alkenes and N′-acyl arylhydrazines has been developed by using air as the terminal oxidant. This protocol features wide functional group tolerance and produces highly chemoselective and regioselective products with good to excellent yields.
Synthesis, Radiosynthesis and Biological Evaluation of Buprenorphine‐Derived Phenylazocarboxamides as Novel μ‐Opioid Receptor Ligands
作者:Jasmin Krüll、Stefanie K. Fehler、Laura Hofmann、Natascha Nebel、Simone Maschauer、Olaf Prante、Peter Gmeiner、Harald Lanig、Harald Hübner、Markus R. Heinrich
DOI:10.1002/cmdc.202000180
日期:2020.7.3
Targeted structural modifications have led to a novel type of buprenorphine‐derived opioid receptorligand displaying an improved selectivity profile for the μ‐OR subtype. On this basis, it is shown that phenylazocarboxamides may serve as useful bioisosteric replacements for the widely occurring cinnamide units, without loss of OR binding affinity or subtype selectivity. This study further includes
Synthesis of Cinnolines and Cinnolinium Salt Derivatives by Rh(III)-Catalyzed Cascade Oxidative Coupling/Cyclization Reactions
作者:Yanwei Wang、Bin Li、Baiquan Wang
DOI:10.1021/acs.joc.8b01548
日期:2018.9.21
A novel method for the synthesis of cinnolines and cinnolinium salt derivatives via Rh(III)-catalyzed cascade oxidative coupling/cyclizationreaction from Boc-arylhydrazines and alkynes has been developed. The reactions have a broad substrate scope and high stereoselectivity with readily available starting materials and provides an efficient synthetic route for this kind of compounds. A catalytically
Copper(<scp>ii</scp>)-catalyzed coupling reaction: an efficient and regioselective approach to N′,N′-diaryl acylhydrazines
作者:Ji-Quan Zhang、Gong-Bin Huang、Jiang Weng、Gui Lu、Albert S. C. Chan
DOI:10.1039/c4ob02343a
日期:——
An efficient and regioselective copper(ii)-catalyzed coupling reaction of N′-aryl acylhydrazines for the synthesis of N′,N′-diaryl acylhydrazines has been developed.