Synthesis of nitroxide derivatives of alkylnitrosourea
摘要:
Nitroxide derivatives of alkylnitrosoureas were prepared by the reaction of amino nitroxide radicals with activated N-alkyl-N-nitrosocarbamates or by the selective reduction of oxoammonium derivatives of alkylnitrosoureas.
Oxidation and nitrosation of 4-(3-alkylureido)-2, 2, 6, 6-tetramethylpiperidine-1-oxyls to 4-(3-alkyl-3-nitrosoureido)-2, 2, 6, 6-tetramethyl-1-oxopiperidinium salts
摘要:
4-(3-Alkylureido)-2,2,6,6-tetramethylpiperidine-1-oxyls are rapidly oxidized by N2O4 or NOCl to 4-(3-alkylureido)-2,2,6,6-tetramethyl-1-oxopiperidinium nitrates and chlorides, which are then nitrosated to 4-(3-alkyl-3-nitrosoureido)-2,2,6,6-tetramethyl-1-oxopiperidinium salts. The perchlorates of the latter were prepared by an exchange reaction with HClO4. The nitrosation of alkylureidooxoammonium salts is the first example of chemical modification of oxoammonium derivatives in which the highly reactive >N+=O group is inert toward the reagent.
Oxidation and nitrosation of 4-(3-alkylureido)-2, 2, 6, 6-tetramethylpiperidine-1-oxyls to 4-(3-alkyl-3-nitrosoureido)-2, 2, 6, 6-tetramethyl-1-oxopiperidinium salts
作者:V. D. Sen'、V. A. Golubev
DOI:10.1007/bf00698441
日期:1993.3
4-(3-Alkylureido)-2,2,6,6-tetramethylpiperidine-1-oxyls are rapidly oxidized by N2O4 or NOCl to 4-(3-alkylureido)-2,2,6,6-tetramethyl-1-oxopiperidinium nitrates and chlorides, which are then nitrosated to 4-(3-alkyl-3-nitrosoureido)-2,2,6,6-tetramethyl-1-oxopiperidinium salts. The perchlorates of the latter were prepared by an exchange reaction with HClO4. The nitrosation of alkylureidooxoammonium salts is the first example of chemical modification of oxoammonium derivatives in which the highly reactive >N+=O group is inert toward the reagent.
Synthesis of nitroxide derivatives of alkylnitrosourea
作者:V. D. Sen'
DOI:10.1007/bf00698442
日期:1993.3
Nitroxide derivatives of alkylnitrosoureas were prepared by the reaction of amino nitroxide radicals with activated N-alkyl-N-nitrosocarbamates or by the selective reduction of oxoammonium derivatives of alkylnitrosoureas.