Abstract
AbstractNovel single‐group bifunctional hydrogen‐bonding catalysts based on thiazolium were developed. The integration of hydrogen‐bonding donor and acceptor in a single thiazolium ring not only amplified synergetic effect, but also enhanced the stability and the controllability for catalysis, and hence prompt thiazolium an efficient metal‐free catalyst for melt ROP of cyclic esters. More interestingly, thiazolium may form a compacted active center with monomer and initiator (or propagating chain end), thus enabling it to selectively activate lower sterically encumbered substrates in ROP.
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