Inorganic Chemistry, Vol.51, No.1, 10-12, 2012
Cyclam Functionalization through Isocyanate Insertion in Zr-N Bonds
The insertion of isocyanates in (Bn(2)Cyclam)ZrX2 is regioselective; (Bn(2)Cyclam)Zr(OR)(2) produces urea-like moieties by the insertion of RN=C=O in the Zr-N-amido bonds of the cyclam ring. Depending on the bulkiness of the isocyanate R groups, O- and N-bound ureates are formed. (Bn(2)Cyclam)Zr((NHBu)-Bu-t)(2) reacts with MesN=C=O at the terminal Zr-N bonds.