Reactions of 2-aryl-4-arylidene-4H-oxazol-5-ones with 3-amino-l,2,4-triazole,5-aminotetrazole,and 2 - aminobenzimidazole

摘要

The reactions of 3-amino-l,2,4-triazole,5-aminotetrazole,and 2-aminobenzimidazole with 2-aryl-4-arylidene-4H-oxazol-5-ones (azlactones) were studied.The electron-releasing properties of the azole ring were demonstrated to influence the reaction pathway of azlactones with aminoazoles.The structures of the resulting compounds were established by ~1H and ~(13)C NMR spectroscopy using spin-spin decoupling and the nuclear Overhauser effect.