1-Oxyl-2,2,6,6-tetramethyl-4-piperidone cyanohydrin (5) was prepared by addition of HCN to 1-oxyl-2,2,6,6-tetramethyl-4-piperidone (4). The cyanohydrin was used to synthesize 1-oxyl-4-carboxy-2,2,6,6-tetramethylpiperidine (2) and 1-oxyl-4-carboxy-2,2,6,6-tetramethyl-1,2,5,6-tetrahydropyridine (3) which are useful nitroxyl radicals for spin labeling studies.
Die Behandlung des Piperidonoxyls (I) mit wäßrig schwefelsaurem NaCN liefert das Cyanhydrin (II), dessen Dehydratisierung das Tetrahydropyridinoxyl (III) ergibt.
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