Hydroxylamine-O-sulfonic acid reacts with alicyclic ketones over SiO2 under microwave irradiation to give an amino acid salt, which cyclises in high yield to the corresponding lactam after work up in basic medium.
A. Laurent, P. Jacquault, J. Di Martino and J. Hamelin, J. Chem. Soc., Chem. Commun., 1995, 1101 DOI: 10.1039/C39950001101
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