Rearrangements of 2-Pyridyl-3-arylaminoisoxazol-5 (2H)-ones to Imidazo [1, 2-a] pyridines under Flash-Vacuum-Pyrolysis

D Setamdideh, S Khanahmadzadeh…

Index: Setamdideh, Davood; Khanahmadzadeh, Salah; Khorshidi, Nasrin Asian Journal of Chemistry, 2012 , vol. 24, # 7 p. 2884 - 2890

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Abstract

2-Pyridyl-3-arylaminoisoxazol-5(2H)-ones, rearranged under flash-vacuum-pyrolysis (FVP) conditions accompanied by elimination of carbon dioxide to give imidazo[1,2-a]pyridines in high to excellent yields (85-95 %). ... 4-MeC6H4)2 with triethylamine in ethanol give imidazo annulated compounds (2, Ar: 4-BrC6H4 (84 %), 4-MeC6H4 (75 %) as net products (Scheme-I). ... 2-Pyridyl-3-arylaminoisoxazol -5(2H)-ones, rearranged under flash-vacuum-pyrolysis (FVP) conditions accompanied by ...