The protection of 1,4,7,10-tetraazacyclododecane by a methylsilyl group leads selectively to N-mono- and N1, N7-symmetrically or dissymmetrically alkylated compounds.
A. Roignant, I. Gardinier, H. Bernard, J. Yaouanc and H. Handel, J. Chem. Soc., Chem. Commun., 1995, 1233 DOI: 10.1039/C39950001233
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