Sulfonated chitosan encapsulated magnetically Fe3O4 nanoparticles as effective and reusable catalyst for ultrasound-promoted rapid, three-component synthesis of spiro-4H-pyrans

نویسندگانحسین نعیمی,مریم فرحناک ضرابی
نشریهJournal of The Iranian Chemical Society
شماره صفحات2017
شماره مجلد15
ضریب تاثیر (IF)1.593
نوع مقالهFull Paper
تاریخ انتشار2018-09-11
رتبه نشریهعلمی - پژوهشی
نوع نشریهالکترونیکی
کشور محل چاپایران
نمایه نشریهISI

چکیده مقاله

A facile one-pot protocol for synthesis of spiro-4H-pyrans using sulfonated chitosan-coated Fe3O4 nanoparticles ( Fe3O4@ CS-SO3H NPs) as an efficient catalyst under ultrasonic condition has been developed. First, the Fe3O4@ CS NPs were prepared from the reaction of chitosan with Fe3O4 NPs. Then, the treatment of Fe3O4@ CS NPs with chlorosulfonic acid leads to the formation of Fe3O4@ CS-SO3H NPs which exerts excellent catalytic activity toward one-pot, three-component synthesis of spiro-4H-pyran derivatives. The core–shell structure and the composition of produced magnetic nanocatalyst were characterized by FT-IR, XRD, VSM, SEM and EDX techniques.

tags: Spiro-4H-pyran · Magnetic nanoparticles · Fe3O4@CS-SO3H NPs · Chitsan · Ultrasonic irradiation