Nitroimidazoles XVII. Nucleophilic amination or ring transformation in reactions of 1-aryl-4-nitroimidazoles with 4-amino-1,2,4-triazole or hydroxylamine
摘要:
1-aryl-4-nitroimidazoles under action of 4-amino-1,2,4-triazole in the presence of MeONa in DMSO undergo a vicarious nucleophilic substitution of hydrogen to give 5-amino-1-aryl-4-nitroimidazoles. If reacted with hydroxylamine in the presence of KOH or MeONa in methanol (but not in DMSO) 1-aryl-4-nitroimidazoles undergo a transformation to 4-acylamino-2-aryl-1-oxy-2H-1,2.3-triazoles but do not yield amination products.
Synthesis and anti-tuberculosis activity of N-aryl-C-nitroazoles
摘要:
Twelve N-aryl derivatives of 4-nitroimidazole, 2-methyl-4-nitroimidazole, 4-nitropyrazole or 3-nitro-1,2,4-triazole have been synthesized either by a degenerated ring transformation reaction of 1,4-dinitroimidazoles with 4-substituted anilines or by a condensation of fluoronitrobenzenes with salts prepared from C-nitro-1H-azoles and 1,8-diazabicyclo[5.4.0]-7-undecene. The Tuberculosis Antimicrobial Acquisition and Coordinating Facility has provided anti-mycobacterial data concerning inhibition activity of 12 compounds. (C) 2004 Elsevier SAS. All rights reserved.