Titanium complexes bearing benzotriazole iminophenolate ligands as efficient catalysts for ring-opening polymerization of cyclic esters

Titanium complexes derived from imino-benzotriazole phenolate (IBTP) ligands were synthesized and fully characterized. Mono-IBTP complex 1 is an efficient catalyst for the ring-opening polymerization of ε-caprolactone and lactide, affording polymers with the expected molecular weights and narrow PDIs.101