Sulfonic acid carbon-(bio)based and natural clays-based catalysts were prepared investigated for the first time as heterogeneous amide bond synthesis by a Ritter reaction. The different SO3H-catalysts screened using benzyl alcohol acetonitrile model substrates, MWCNT-CSP revealed to be an efficient catalyst, affording in 75 % yield. practical utility of was demonstrated diverse range amides, ob...

Carbon-based acid–base bifunctional catalyst was synthesized by the functionalization of activated carbon (AC) with 3-mercaptopropyl trimethoxysilane, 3-aminopropyl and H2SO4 via sulfhydrylation, ammonifiation, sulfonation successively. The as-prepared NH2-AC-SO3H characterized infrared spectroscopy, X-ray diffraction, thermogravimetric analysis Brunauer–Emmet–Teller specific area analysis, it ...

The objective of this study was to prepare carbonaceous catalysts. Taking cellulose as the starting material, functionalization with sulphuric acid done using 1:10 w/v ratio under one pot hydrothermal treatment at 80 °C. catalyst extensively characterized BET, XPS, TGA, SEM, FT-IR, XRD etc. synthesized C-SO3H had a surface area 447 m2g−1, pore radius 30.020 Å and volume 0.157 cc g−1. total acid...

Sulfonated-silica-coated cobalt ferrite (CoFe2O4) magnetic nanoparticles (MNPs-SiCoFe-SO3H) are efficient heterogeneous catalysts for the synthesis of 3,4-dihydropyrimidin-2(1H)-one and octahydroquinazoline derivatives in absence solvent. The effects solvent, temperature, catalyst amount on reaction investigated. easy separation, reusability catalyst, simplicity procedure, mild conditions, good...

in this research, so3h-functionalizedphthalimide (sfp) has been prepared through simple reaction of phthalimide with chlorosulfonic acid, and characterized using ft-ir, 1h nmr, 13c nmr, sem (scanning electron microscopy), mass and tg (thermal gravimetric) spectra. afterward, the solid acid has been utilized as an efficient, green, heterogeneous and recyclable catalyst for the solvent-free synth...