Triazole-Functionalized Silica Supported Palladium

Two novel triazole-modified silica supports A and B were successfully prepared via "click" reaction of azide-functionalized SiO.sub.2 with propargyl alcohol (A) and propargyl amine (B), in which the click-triazole as an important functional entity, in addition to a molecular linker, provid...

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Bibliographic Details
Published in:Catalysis letters 2018-04, Vol.148 (4), p.1035
Main Authors: Hajipour, Abdol Reza, Mohammadsaleh, Fatemeh
Format: Article
Language:English
Subjects:
Acetates
Alcohols
Amines
Palladium
Palladium catalysts
Silicon dioxide
Triazoles
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Summary:Two novel triazole-modified silica supports A and B were successfully prepared via "click" reaction of azide-functionalized SiO.sub.2 with propargyl alcohol (A) and propargyl amine (B), in which the click-triazole as an important functional entity, in addition to a molecular linker, provides capabilities of metal coordination as an excellent chelator. Treatment of the resulting click-supports with Pd(OAc).sub.2 afforded the click-catalysts A and B, which were well characterized and evaluated in Suzuki-Miyaura coupling in terms of activity and recyclability in H.sub.2O/EtOH solvent. The catalyst A showed more reasonable results and so, was applied as a highly efficient and recyclable catalyst in the coupling reactions of various aryl halides with phenylboronic acid under phosphine-free and low Pd loading conditions.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-018-2316-5