One-step synthesis of <i>N</i>,<i>N</i>′-substituted 4-imidazolidinones by an isocyanide-based pseudo-five-multicomponent reaction
作者:Cecilia I. Attorresi、Evelyn L. Bonifazi、Javier A. Ramírez、Gabriel F. Gola
DOI:10.1039/c8ob02229a
日期:——
A pseudo-five-multicomponent reaction involving an isocyanide, a primary amine, two molecules of formaldehyde and water is reported, which gives N,N′-substituted 4-imidazolidinones when trifluoroethanol is used as the solvent. The reaction proceeds with good yields and with a wide variety of amines and isocyanides, providing an efficient new entry to these heterocycles. A preliminary study of the reaction
报道了涉及异氰酸酯,伯胺,甲醛和水的两个分子的拟五多组分反应,当使用三氟乙醇作为溶剂时,该反应会生成N,N'-取代的4-咪唑啉酮。该反应以良好的产率进行,并与多种胺和异氰化物进行反应,为这些杂环提供了有效的新途径。对反应机理的初步研究表明,三氟乙醇虽然起着溶剂的作用,但直接作为试剂参与了反应路径。