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Thiazolium as Single‐Group Bifunctional Catalyst for Selectively Bulk Melt ROP of Cyclic Esters
Author(s) -
Tian GuoQiang,
Liu Wen,
Chen Li,
Wu Gang,
Chen SiChong,
Wang YuZhong
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900901
Subject(s) - bifunctional , catalysis , chemistry , steric effects , monomer , hydrogen bond , combinatorial chemistry , ring (chemistry) , polymer chemistry , acceptor , polymerization , photochemistry , organic chemistry , polymer , molecule , physics , condensed matter physics
Novel 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 eect, 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.