Preparation, Characterization and Selective Reactions of Novel [1,3]Diazetidine-2,4-diones (Uretdiones) - A New Route to Generate Asymmetric Substituted Toluylenediisocyanate-Derivatives
The selective cyclodimerization of monomeric diisocyanates like IPDI 4 and TDI 5 yields [1,3]diazetidine-2,4-diones (uretdiones). On this basis, a new method for the selective transformation of the NCO-groups of asymmetric substituted diisocyanates is des