Ring-opening polymerization of bicyclic and spiro compounds. Reactivities and polymerization mechanisms

A High-Tg Polyamide Derived from Lignocellulose and CO2

“…35,36 Other less strained bicyclic lactams have required more forcing conditions or have failed to undergo AROP entirely. 37 Conversely, more highly strained beta-lactams typically undergo rapid AROP under mild conditions but do not exhibit depolymerization. 34 The structure of PITC was characterized using NMR and MALDI-TOF MS.…”

Synthetic galactomannans with potent anti-HIV activity

“…The C1 signal at 97.5 ppm due to the mannose main chain decreased with increasing LMTBE units, and a new C1 signal at 98.5 ppm appeared due to the C1 signal of the mannose main chain without attached galactose branches. The polymerization of 1, 6-anhydro hexose monomers proceeded by the trialkyloxonium ion mechanism (Okada, 1992). The copolymers also had (1 → 6)-␣ stereoregularity, because both homopolymers had a (1 → 6)-␣-pyranosidic structure and the specific rotations of the copolymers had high and positive values.…”

Synthesis and Polymerizability of Atom-Bridged Bicyclic Monomers

“…Although monomer 17 is both a bicyclic lactam and a bicyclic ether, it has only been polymerized as the former by an anionic mechanism; cationic ether polymerization is excluded because of the basic amide group. This topic has been reviewed [15][16][17].…”

“…Monomer 37 showed a propensity for macrocyclic oligomerization. The bicyclic oxalactone polymers, also stemming from dihydropyrans, have been reviewed [15][16][17].…”