Soon after this report, Barner-Kowollic and coworkers [92] modified the synthesis procedure. In this case, furan-protected maleimide functional ATRP initiator
was first used to control the polymerization of MMA or tBA. The bromo chain end
was converted to a cyclopentadienyl group with NiCp2, NaI and triphenyl phosphorus, followed by cyclization in toluene under refluxing. The cyclic product was
obtained with nearly quantitative conversion, as shown by ESI-MS characterization
(Scheme 43).
Scheme 42 Synthesis of cyclic PSTY through the combination of ATRP and Diels–Alder
reaction
Scheme 41 Synthesis of cyclic PMMA through the combination of living anionic polymerization
and Diels–Alder reaction
Scheme 43 Synthesis of cyclic PMMA and P
t
BA through the combination of ATRP and
Diels–Alder reaction
324
Z. Jia and M.J. Monteiro
was first used to control the polymerization of MMA or tBA. The bromo chain end
was converted to a cyclopentadienyl group with NiCp2, NaI and triphenyl phosphorus, followed by cyclization in toluene under refluxing. The cyclic product was
obtained with nearly quantitative conversion, as shown by ESI-MS characterization
(Scheme 43).
Scheme 42 Synthesis of cyclic PSTY through the combination of ATRP and Diels–Alder
reaction
Scheme 41 Synthesis of cyclic PMMA through the combination of living anionic polymerization
and Diels–Alder reaction
Scheme 43 Synthesis of cyclic PMMA and P
t
BA through the combination of ATRP and
Diels–Alder reaction
324
Z. Jia and M.J. Monteiro