Inductive Effect-Assisted Chain-Growth Polycondensation. Synthetic Development from <i>p</i><i>ara-</i> to <i>m</i><i>eta-</i>Substituted Aromatic Polyamides with Low Polydispersities
self-polycondensation, but chain-growthpolycondensation. The methyl ester monomer 1a polymerized with lithium hexamethyldisilazide (LiHMDS) in the presence of phenyl benzoate (3a) as an initiator at 0 degrees C to afford a polymer with a lowpolydispersity, but the product contained a small amount of self-condensation polymer. On the other hand, the polymerization of the ethyl ester monomer (1b) with phenyl 4-methylbenzoate