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Synthesis of Enaminone‐Pd(II) Complexes and Their Application in Catalysing Aqueous Suzuki‐Miyaura Cross Coupling Reaction
Author(s) -
Fu Leiqing,
Cao Xiaoji,
Wan JiePing,
Liu Yunyun
Publication year - 2020
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201900417
Subject(s) - chemistry , reagent , aryl , catalysis , aqueous medium , aqueous solution , coupling reaction , boronic acid , suzuki reaction , combinatorial chemistry , palladium , organic chemistry , polymer chemistry , alkyl
Summary of main observation and conclusion A series of Pd(II)‐enaminone complexes, termed Pd(eao) 2 , have been synthesized and characterized. The investigation on the catalytic activities of these new Pd(II)‐reagents has proved that the Pd(eao) 2 ‐ 1 possesses excellent catalytic activity for the Suzuki‐ Miyaura cross coupling reactions of aryl bromides/chlorides with aryl/vinyl boronic acids in the environmentally benign media of aqueous PEG400 at low loading (5 mol‰). The superiority of this Pd(II)‐reagent to those commercial Pd(II) and Pd(0) catalysts in catalyzing the reactions has been confirmed by parallel experiments. What's more, Pd(eao) 2 ‐ 2 has been found as a practical catalyst for the homo‐coupling reactions of aryl boronic acids.