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.
Synthesis and Biological Evaluation of New Sulfonamide Derivatives as Potential Anti-Trypanosoma cruzi Agents
作者:Virgilio Bocanegra-Garcia、Juan Carlos Villalobos-Rocha、Benjamin Nogueda-Torres、Maria Edith Lemus- Hernandez、Argelia Camargo-Ordonez、Ninfa Maria Rosas-Garcia、Gildardo Rivera
DOI:10.2174/1573406411208061039
日期:2012.9.1
Chagas disease continues to be one of the main parasitic diseases in Latin America. Despite the fact that it was
discovered more than 100 years ago, no suitable pharmacologic treatment is available. We report the synthesis of new sulfonamidoquinoline
and sulfonamides derivatives that were evaluated in vitro against two strains of Trypanosoma cruzi
(NINOA and INC-5). Structure-activity relationship analysis indicated that small aromatic and large aromatic substituents
on 4-aminoquinaldine increased trypanocidal activity on INC-5 and NINOA strains, respectively. Additionally, results
show the importance of the sulfonamide group as a scaffold for the development of new anti-T. cruzi agents. Seven sulfonamide
derivatives showed better lytic activity than nifurtimox and beznidazole against both strains of T. cruzi. N-
(biphenyl-4-yl-sulfonyl)-nicotinamide (P-012) was established as the leader of the series for the development of more effective
agents.
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