The present invention relates to a process for forming polymer conjugates which are useful as enzyme inhibitors. The process of the present invention comprises the steps of: a) reacting a polymer or copolymer alcohol to form a chloroformate; b) combining a substituted or unsubstituted anthranilic acid comprising an enzyme interaction attenuating unit; and a base catalyst wherein the base catalyst is a supported base catalyst, to form a substrate reactive admixture; and c) adding to said chloroformate formed in step (a) said substrate reactive admixture formed in step (b) to form a benzoxazin-4-one conjugate.