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US 5,849,929 AGranted
Process for the preparation of imidazoline nitroxyl
AssigneeUniroyal Chemical Company, Inc.
InventorsLeonid B. Volodarsky, Stephen M. Fagan
Life of this patent
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Abstract
A process is provided for the preparation of imidazoline derivatives such as imidazoline nitroxyls and 1-hydroxy imidazoline.
Claims30
A process for the preparation of an imidazoline nitroxyl which comprises:
- a) reacting a haloketone with aqueous ammonia and a carbonyl compound, either simultaneously or sequentially, to provide an imidazoline hydrate;
- b) recovering the imidazoline hydrate in substantially pure form;
- c) dissolving the recovered hydrated imidazoline in an aqueous medium;
- and,
- d) oxidizing the dissolved imidazoline hydrate to provide an imidazoline nitroxyl.
2 more elements
A process for the preparation of 2,2,4,5,5-pentamethyl-3-imidazoline-1-oxyl which comprises:
- a) reacting 3-chloro-3-methyl-2-butanone with aqueous ammonia and acetone, either simultaneously or sequentially, to provide 2,2,4,5,5-pentamethyl-3-imidazoline hydrate;
- b) recovering the 2,2,4,5,5-pentamethyl-3-imidazoline hydrate in substantially pure form;
- c) dissolving the recovered 2,2,4,5,5-pentamethyl-3-imidazoline hydrate in an aqueous medium;
- and,
- d) oxidizing the dissolved 2,2,4,5,5-pentamethyl-3-imidazoline hydrate to provide product 2,2,4,5,5-pentamethyl-3-imidazoline-1-oxyl.
2 more elements
Dependencies are inferred from the claim text.