Room-Temperature Suzuki-Miyaura Coupling of Heteroaryl Chlorides and Tosylates
作者:Junfeng Yang、Sijia Liu、Jian-Feng Zheng、Jianrong Steve Zhou
DOI:10.1002/ejoc.201200918
日期:2012.11
Suzuki–Miyauracoupling of heteroaryls is an important method for the preparation of compound libraries for medicinal chemistry and materials research. Although many catalysts have been developed, none of them have been generally applicable to the coupling reactions of heteroarylchlorides and tosylates at room temperature. We discovered that a catalyst combination of Pd(OAc)2 and XPhos (2-dicyclohexylphosphanyl-2′
Role of Mono-N-protected Amino Acid Ligands in Palladium(II)-Catalyzed Dehydrogenative Heck Reactions of Electron-Deficient (Hetero)arenes: Experimental and Computational Studies
We report here that mono-N-protected amino acids (MPAAs), an important environmentally compatible structural motif, enable acceleration of Pd(II)-catalyzed dehydrogenative Heckreactions between pyridines and electron-deficient arenes with simple alkenes, leading to diversely functionalized C3- or meta-selective alkenylated pyridines and benzenes via non-chelate-assisted C–H activation. A comprehensive
Palladium-Catalyzed Reductive Coupling Reaction of Terminal Alkynes with Aryl Iodides Utilizing Hafnocene Difluoride as a Hafnium Hydride Precursor Leading to <i>trans</i>
-Alkenes
作者:Keita Takahashi、Yohei Ogiwara、Norio Sakai
DOI:10.1002/asia.201701775
日期:2018.4.4
Herein, we describe a reductive cross‐coupling of alkynes and aryl iodides by using a novel catalytic system composed of a catalytic amount of palladium dichloride and a promoter precursor, hafnocene difluoride (Cp2HfF2, Cp=cyclopentadienyl anion), in the presence of a mild reducing reagent, a hydrosilane, leading to a one‐pot preparation of trans‐alkenes. In this process, a series of coupling reactions
Electrochemical Aziridination of Internal Alkenes with Primary Amines
作者:Maksim Ošeka、Gabriele Laudadio、Nicolaas P. van Leest、Marco Dyga、Aloisio de A. Bartolomeu、Lukas J. Gooßen、Bas de Bruin、Kleber T. de Oliveira、Timothy Noël
DOI:10.1016/j.chempr.2020.12.002
日期:2021.1
realizes this concept via an oxidative coupling between alkenes and primary alkylamines. The reaction is carried out in an electrochemical flow reactor leading to short reaction/residence times (5 min), high yields, and broad scope. At the cathode, hydrogen is generated, which can be used in a second reactor to reduce the aziridine, yielding the corresponding hydroaminated product. Mechanistic investigations