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 photochemical properties of 1-aryl-4-nitroimidazoles are described. These compounds are good sensitizers of superoxide ion. Only 1-phenyl-2-methyl-4-nitroimidazole is a photosensitizer of singlet oxygen.
Transformations of the imidazole ring in 1-alkyl and 1-aryl-4-nitroimidazoles following the attack of hydroxylamine or 4-amino-1,2,4-triazole
作者:Jerzy Suwinski、Krzysztof Swierczek
DOI:10.1007/bf01164709
日期:1996.9
Nucleophilic alkylation and ring transformation in 4-nitroimidazoles
作者:Jerzy Suwiński、Krzysztof Świerczek
DOI:10.1007/bf02252272
日期:1998.6
Suwinski; Swierczek; Wagner, Polish Journal of Chemistry, 2001, vol. 75, # 5, p. 639 - 647
作者:Suwinski、Swierczek、Wagner、Kubicki、Borowiak
DOI:——
日期:——
Nitroimidazoles XVII. Nucleophilic amination or ring transformation in reactions of 1-aryl-4-nitroimidazoles with 4-amino-1,2,4-triazole or hydroxylamine
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.