A novel one-pot multicomponent reaction to synthesize substituted imidazopyrazines is described. In brief, 1H-(imidazol-5-yl)-N-substituted methanamines react with aldehydes and isocyanides in methanol at room temperature to give imidazopyrazine derivatives in excellent yields. The imidazole nitrogen atom was able to intercept the nascent nitrilium ion, channeling the reaction toward to the sole formation of imidazopyrazines, suppressing the competitive formation of other possible side products deriving from the reaction with the high-energy nitrilium ion. The number of examples and the variability of the nature of isocyanides, aldehydes, and amine components herein employed, witness the robustness of this novel methodology.
|Titolo:||Exploiting the Nucleophilicity of the Nitrogen Atom of Imidazoles : One-Pot Three-Component Synthesis of Imidazo-Pyrazines|
|Parole Chiave:||interrupted Ugi reactions; isocyanides; multicomponent reactions|
|Settore Scientifico Disciplinare:||Settore CHIM/08 - Chimica Farmaceutica|
|Data di pubblicazione:||21-mag-2019|
|Digital Object Identifier (DOI):||10.3390/molecules24101959|
|Appare nelle tipologie:||01 - Articolo su periodico|