Nickel-Catalyzed N-Arylation of Amides with (Hetero)aryl Electrophiles by Using a DBU/NaTFA Dual-Base System
作者:Mark Stradiotto、Travis Lundrigan、Joseph P. Tassone
DOI:10.1055/a-1337-6459
日期:2021.10
The first nickel-catalyzed N-arylation of amides with (hetero)aryl (pseudo)halides employing an organic amine base is described. When using Ni(COD)2/CyPAd-DalPhos catalyst mixtures in combination with DBU/NaTFA as a dual-base system, a diversity of (hetero)arylchloride, bromide, tosylate, and mesylate electrophiles were successfully cross-coupled with structurally varied primary amides, as well as
Hypervalent Iodine(III)-Promoted Phenyl Transfer Reaction from Phenyl Hydrazides to Nitriles
作者:Yan Yan、Zhiguo Zhang、Yameng Wan、Guisheng Zhang、Nana Ma、Qingfeng Liu
DOI:10.1021/acs.joc.7b01215
日期:2017.8.4
nitriles to N-phenyl amides has been achieved through a novel intermolecular phenyl transfer reaction from phenyl hydrazides and N-addition to nitriles in the presence of PIFA under mild and solvent-free conditions. This cross-coupling reaction includes the oxidative cleavage of sp2 C–N bonds of phenyl hydrazides to form a phenyl radical and the subsequent N-addition to cyanos to form new sp2 C–N bonds
Nickel-Catalyzed N-Arylation of Primary Amides and Lactams with Activated (Hetero)aryl Electrophiles
作者:Christopher M. Lavoie、Preston M. MacQueen、Mark Stradiotto
DOI:10.1002/chem.201605095
日期:2016.12.23
The first nickel‐catalyzed N‐arylation of amides with (hetero)aryl (pseudo)halides is reported, enabled by use of the air‐stable pre‐catalyst (PAd‐DalPhos)Ni(o‐tolyl)Cl (C1). A range of structurally diverse primary amides and lactams were cross‐coupled successfully with activated (hetero)aryl chloride, bromide, triflate, tosylate, mesylate, and sulfamate electrophiles.
Lewis acid promoted electrophilic aromatic substitution reaction of nitrile oxide: Increase of the electrophilicity of carbon atom of nitrile oxide by Lewis acid complexation
作者:Jae Nyoung Kim、Eung K. Ryu
DOI:10.1016/s0040-4039(00)73637-9
日期:1993.5
Nitrile oxides complexed with Lewisacid have their increased electrophilic character at the carbon atom and could be used as hydroxynitrilium ion equivalents toward aromatic compounds.