Zinc Chloride Promoted Formal Oxidative Coupling of Aromatic Aldehydes and Isocyanides to α-Ketoamides
摘要:
Reaction of aromatic aldehydes and isocyanides in the presence of N-methylhydroxyamine, acetic acid, and zinc chloride affords the aryl alpha-ketoamides in moderate to good yields.
Iodobenzene derivatives possessing various substituents (amino, hydroxy, tert-butyl, methyl, isopropyl, phenyl, fluoro, chloro, methoxycarbonyl, acetyl, trifluoromethyl, nitro) in the para position were aminocarbonylated using tert-butylamine and n-butylamine as N-nucleophiles. A palladium(0) catalyst formed in situ from palladium(II) acetate and triphenylphosphine was used. Carboxamide and ketocarboxamide
Application of γ-Valerolactone as an Alternative Biomass-Based Medium for Aminocarbonylation Reactions
作者:Diána Marosvölgyi-Haskó、Blanka Lengyel、József M. Tukacs、László Kollár、László T. Mika
DOI:10.1002/cplu.201600389
日期:2016.11
γ-Valerolactone (GVL) was proposed as a renewable, nontoxic reactionmedium with negligible vapor pressure for homogeneous Pd-catalyzed aminocarbonylationreactions. Iodobenzene as a model substrate and its 4-substituted derivatives were converted to the corresponding 2-ketocarboxamides with high conversions and chemoselectivities in γ-valerolactone. The effect of carbon monoxide pressure and reaction
Transition Metal‐Free N−S Bond Cleavage and C−N Bond Activation of Ugi‐Adducts for Rapid Preparation of Primary Amides and α‐Ketoamides
作者:Chao Liu、Johan Van der Eycken、Erik V. Van der Eycken
DOI:10.1002/chem.202301541
日期:2023.9.21
combination of an Ugi-4CR and a transition metal-free selective N−S bond cleavage and C−N bond activation, diverse primary amides and α-ketoamides were simultaneously obtained in a highly efficient, rapid, and step-economical manner. The reaction features broad substrate scope, excellent functional-group tolerance, and exclusive selectivity. Primary amides derived from the pharmaceuticals probenecid and febuxostat