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In Situ Preparation of Palladium Nanoparticles for C‐2 Selective Arylation of Indoles in Agro‐Waste Extract Based Mixed Solvents
Author(s) -
Sun Yajun,
Wang Rui,
Liu Tianxiang,
Jin Weiwei,
Wang Bin,
Zhang Yonghong,
Xia Yu,
Liu Chenjiang
Publication year - 2021
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.202100331
Subject(s) - palladium , chemistry , catalysis , nanoparticle , transmission electron microscopy , ligand (biochemistry) , scanning electron microscope , spectroscopy , nuclear chemistry , organic chemistry , nanotechnology , materials science , biochemistry , receptor , physics , quantum mechanics , composite material
An efficient and practical method for the in situ generation of palladium nanoparticles was successfully established in a water extract of pomelo peel ash. The produced palladium nanoparticles were characterized by energy‐dispersive X‐ray spectroscopy elemental mapping, field emission scanning electron microscopy, high‐resolution transmission electron microscope, X‐ray powder diffraction, and showed high catalytic activity for selective C‐2 arylation of indoles. A series of 2‐arylindoles were smoothly installed in moderate to good yields through the direct palladium‐catalyzed cross‐coupling reactions of indoles and iodoarenes without external ligand, base, oxidant, and preinstallation directing group.