Novel chemistry of β-lactones anionic polymerization

Some examples of novel chemistry of lactones polymerization are presented. New evidences on β-lactones polymerization by akali metal alkoxides and, also unusual in organic chemistry, C-C bond scission in β-lactones polymerization induced by alkali metal supramolecular complexes are discussed. Preparation of functional polyesters and various block polymers exhibiting “tailored” properties are also described.