Regioselective N-substitution of cyclen with two different alkyl groups: synthesis of all possible isomers

Chem Commun (Camb). 2003 Mar 21:(6):766-7.

Abstract

All possible configurations of two different groups on the four nitrogen atoms of cyclen were achieved using four differently protected cyclen intermediates including the novel mono-protected cyclen compound, mono-N-Cbz-cyclen.