Hyunuk Kim, Johan V. Olsson, James L. Hedrick, and Robert M. Waymouth
An alpha-beta unsaturated valerolactone was functionalized with
conjugate addition of a thiol. Ring opening polymerization led to
functionalized polyesters, but these substituted monomers underwent
slower polymerization than the unfunctionalized. The group also showed
copolymerization of functionalized valerolactone with caprolactone.