Fig. 2: General synthesis of DbaYKY terminated initiators and application for variable polymerizations.
From: A sandcastle worm-inspired strategy to functionalize wet hydrogels

a Synthesis of DbaYKY terminated initiators for variable polymerizations including α-amino acid N-carboxyanhydrides (NCA) polymerization, atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer (RAFT) polymerization and anionic ring-opening polymerization of β-lactams (AROP). Demonstration of initiating variable classes of polymerizations: b ATRP polymerization, c RAFT polymerization, d NCA polymerization, e AROP polymerization. TFA trifluoroacetic acid, TIS triisopropylsilane.