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Modular “Click” Preparation of Bifunctional Polymeric Heterometallic Catalysts
Author(s) -
Wang Wenlong,
Zhao Liyuan,
Lv Hui,
Zhang Guodong,
Xia Chungu,
Hahn F. Ekkehardt,
Li Fuwei
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201600999
Subject(s) - sbus , bifunctional , transmetalation , catalysis , click chemistry , chemistry , linker , polymer chemistry , copper , combinatorial chemistry , organic chemistry , metal organic framework , operating system , adsorption , computer science
Heterobimetallic molecular complexes or strictly alternating metallated polymers are obtained by a click reaction between mononuclear metal complexes (secondary building units, SBUs) bearing NHCs functionalized with either p ‐azidophenyl or p ‐ethynylphenyl wingtips. With a copper‐NHC complex as SBU the formation of molecular or polymeric compounds did not require any additives as the copper complex catalyzes the click reaction. Transmetallation from heterobimetallic Cu/Ag derivatives to Cu/Pd derivatives was achieved. The linker between the SBUs (flexible or rigid) influences the catalytic activity of the heterobimetallic compounds. The polymer with alternating copper‐NHC and silver‐NHC units and a flexible methylene‐triazole bridge between them shows the highest activity in the catalytic alkynylation of trifluoromethyl ketones to give fluorinated propargylic alcohols.