DOI

A protocol for the synthesis of unsymmetrical ureas substituted by pyridyl/quinolinyl moiety has been developed. This method concluded in metal- and base-free reamination of N,N-dimethyl-N‘-hetaryl ureas with a wide range of aryl and alkyl amines. The isolated yields vary from 40 to 96% depending on the nucleophilicity of the amines. The scope of this method includes more than 50 examples. The reaction is not hindered by either donor or acceptor groups as well as diverse functionalities. The synthesis can be easily scaled to gram quantities. Theoretical calculations supported by experimental data allowed us to propose a plausible mechanism for the process. This reaction takes place through the intermediate formation of hetaryl isocyanate.

Original languageEnglish
Pages (from-to)1295-1304
Number of pages10
JournalAdvanced Synthesis and Catalysis
Volume364
Issue number7
Early online date28 Feb 2022
DOIs
StatePublished - 30 Mar 2022

    Research areas

  • Amines; Heterocycles, Masked hetaryl isocyanates, Metal-free synthesis, N-hetaryl ureas, Heterocycles, CATALYZED CARBONYLATION, Amines, DISCOVERY, BLOCKED ISOCYANATES, AMINES, BIOLOGICAL EVALUATION, GLUCOKINASE ACTIVATORS, DERIVATIVES, MASKED ISOCYANATES FACILE, PARALLEL SYNTHESIS, ANION-BINDING

    Scopus subject areas

  • Catalysis
  • Organic Chemistry

ID: 93324234