A Convenient Approach to the Synthesis of the Imidazo[5,1-b]oxazole Ring System
摘要:
Reaction of 4(5)-bromo-2-methyl-5(4)-nitroimidazole with phenacyl bromide derivatives led to 4-bromo-2-methyl-1-phenacyl-5-nitro- and 5-bromo-2-methyl- 1-phenacyl-4-nitroimidazoles. Treatment of the latter isomers with potassium tert-butoxide in dry THF yielded imidazo[5, 1-b]oxazoles.
Reaction of 4-Bromo-2-methyl-5-nitro-1-phenacylimidazole Derivatives with Morpholine, Pyrrolidine and Piperidine
作者:Stanisław Sobiak
DOI:10.1080/00397919808004841
日期:1998.7
Abstract Reactions of amines (morpholine, pyrrolidine and piperidine) with 4-bromo-2-methyl-5-nitro-1-phenacylimidazoles yielded unexpectedly 5-amino-2-methyl-4-nitro-1-phenacylimidazoles.
Reaction of 4(5)-bromo-2-methyl-5(4)-nitroimidazole with phenacyl bromide derivatives led to 4-bromo-2-methyl-1-phenacyl-5-nitro- and 5-bromo-2-methyl- 1-phenacyl-4-nitroimidazoles. Treatment of the latter isomers with potassium tert-butoxide in dry THF yielded imidazo[5, 1-b]oxazoles.
Isomerization of 4-Bromo-2-methyl-5-nitro-1-phenacylimidazoles into 5-Bromo-2-methyl-4-nitro-1-phenacylimidazoles