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Heterocycles from Acrylonitrile. I. Reactions of 2-Cyano-aziridin with Ketones

2-Cyano-aziridine 2 is stable towards water at room temperature, but yields aziridine-2-carbonamide 6 on addition of cyclohexanone. Hemiaminal 8 is shown by 13C-spectroscopy to be an intermediate in this reaction.

In the absence of water the aminal-like compounds 10 and 11 are formed from 2-cyano-aziridin 2 and ketones.

Above 100° 2 as well as 6 form the imidazolinone 12 on action of cyclohexanone by opening of the aziridine ring and formation of a methyl group.