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DABCO‐modified super‐paramagnetic nanoparticles as an efficient and water‐compatible catalyst for the synthesis of pyrano[3,2‐ c :5,6‐ c ']dichromene‐6,8‐dione derivatives under mild reaction conditions
Author(s) -
Heydari Zahra,
Bahadorikhalili Saeed,
Ranjbar Parviz Rashidi,
Mahdavi Mohammad
Publication year - 2018
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.4561
Subject(s) - catalysis , dabco , thermogravimetric analysis , chemistry , fourier transform infrared spectroscopy , octane , nanoparticle , magnetic nanoparticles , x ray photoelectron spectroscopy , inorganic chemistry , nuclear chemistry , chemical engineering , nanotechnology , organic chemistry , materials science , engineering
In this paper, a novel catalyst is introduced based on the immobilization of 1,4‐diazabicyclo[2.2.2] octane (DABCO) on super‐paramagnetic iron oxide nanoparticles. For the synthesis of the catalyst, silica‐magnetic iron oxide core‐shell nanoparticles were first functionalized by (3‐chloropropyl)trimethoxysilane. The functionalized silica‐magnetic iron oxide core‐shell nanoparticles then reacted with DABCO to form the final catalyst. The catalyst was characterized by scanning electron microscopy, vibrating‐sample magnetometer, thermogravimetric analysis, X‐ray photoelectron spectroscopy and Fourier‐transform infrared spectroscopy. This catalyst was used for the synthesis of pyrano[3,2‐ c :5,6‐ c ']dichromene‐6,8‐dione derivatives. Several starting materials were used, and all of them led to the desired products in high isolated yields (19 examples). The catalyst also showed very good reusability in the reaction.