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A green and chemoselective synthesis of coumarins via Pechmann condensation using recoverable heterogeneous catalyst (Au@pSiO 2 )
Author(s) -
Yaghoobi Mandana,
Zareyee Daryoush,
Khalilzadeh Mohammad A.
Publication year - 2020
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.5787
Subject(s) - chemistry , catalysis , ethyl acetoacetate , phenols , thermogravimetric analysis , condensation , heterogeneous catalysis , organic chemistry , inductively coupled plasma atomic emission spectroscopy , condensation reaction , fourier transform infrared spectroscopy , inductively coupled plasma , green chemistry , chemical engineering , reaction mechanism , physics , plasma , quantum mechanics , engineering , thermodynamics
Nano Au@porous SiO 2 as a heterogeneous catalyst was prepared and characterized by Fourier transform infrared, X‐ray powder diffraction, transmission electron microscopy, thermogravimetric analysis and inductively coupled plasma–atomic emission spectroscopy techniques and then used as an efficient catalyst in the condensation of various phenols with ethyl acetoacetate for the preparation of coumarin derivatives through the Pechmann reaction. The combined merits of chemoselective and solvent free reaction conditions and the recyclability of the nanostructured catalyst make the condensation a safe operation, with low pollution, rapid access to products and simple workup.