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Caffeine gold complex supported on magnetic nanoparticles as a green and high turnover frequency catalyst for room temperature A 3 coupling reaction in water
Author(s) -
Gholinejad Mohammad,
Afrasi Mahmoud,
Najera Carmen
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4760
Subject(s) - catalysis , chemistry , colloidal gold , turnover number , nanoparticle , caffeine , magnetic nanoparticles , coupling reaction , solvent , coupling (piping) , heterogeneous catalysis , chemical engineering , nuclear chemistry , organic chemistry , metallurgy , materials science , medicine , engineering , endocrinology
A new heterogeneous catalyst derived from gold (III) and supported on caffeine‐coated magnetic nanoparticles, Fe 3 O 4 @Caff‐Au, has been prepared and characterized using different techniques. This magnetic gold composite shows high catalytic activity in A 3 coupling reactions of terminal alkynes, aldehydes and secondary amines. Using this green catalyst, propargylamines are obtained in high turnover frequency in short reaction times using water as solvent at room temperature. This stable and ready accessible catalyst can be easily recycled magnetically for at least nine consecutive runs without significant loss of activity and with slight aggregation of Au species.