MWCNT incorporated silica aerogel prepared by ambient pressure drying: A recyclable catalyst for multicomponent synthesis of benzylpyrazolyl coumarin at room temperature
Journal Title: Iranian Chemical Communication - Year 2018, Vol 6, Issue 1
Abstract
Multiwalled Carbon Nanotube (MWCNT) reinforced silica aerogel was synthesized in a very simple and cost effective sol - gel method. The process was followed by ambient pressure drying, and then the aerogel material was characterized by XRD, BET, SEM, EDX and FT-IR. 2.3 x 10-3 wt% MWCNTs were successfully incorporated in sodium silicate based silica aerogel. This metal-free nanocomposite catalyzed a four component organic reaction among 4-hydroxy coumarin, benzaldehyde, phenyl hydrazine, and ethyl acetoacetate for synthesizing medicinally important benzylpyrazolyl coumarin at room temperature. The MWCNT/silica aerogel composite material having easy accessible active sites and high catalytic activity was easily recovered and reused. The aerogel composite when impregnated with ceria offered very efficient and selective reaction methodology.
Authors and Affiliations
Isak Rajjak Shaikh, Noor Mahmad Nabisaheb Maldar, Caroline Sunyong Lee, Rajendra Charandeo Pawar, Hyung -Ho Park, Uzma Khwaja-Husain Bangi
Keywords
Related Articles
- EP ID EP260541
- DOI -
- Views 94
- Downloads 0
Ammonium nitrate as an efficient and green reagent for the oxidation of alcohols into their corresponding carbonyl compounds in the presence of heteropoly acids
Simple, cheap and green protocol for effective conversion of alcohols to corresponding carbonyl compounds in the presence of H14[NaP5W30O110] and ammonium nitrate is reported. The products were characterized by FT-IR and...
Synthesis and characterization of new (2E,2'E)-3,3'-(((3-hydroxypropane-1,2-diyl)bis(oxy))bis (2,1-phenylene))bis(1-phenylprop-2-en-1-one) and its transformation into 2,3-bis(2-(1,3-diphenyl-4,5-dihydro-1H-pyrazol-5-yl)phenoxy)propan-1-ol
In this paper, new (2E, 2'E)-3, 3'-(((3- hydroxypropane-1, 2-diyl) bis (oxy)) bis (2, 1-phenylene)) bis (1-phenylprop-2-en-1-one) (2a) was prepared in good yield by condensation reaction of acetophenone with bisaldehyde...
Liquid phase bromination of phenols over silicotungstic acid immobilized on nickel oxide nanoparticles
Heteropoly acid promoted nanoparticle of nickel oxide samples were prepared by sol-gel method using heteropoly acids. Prepared composite was characterized by XRD, FT-IR and ICP technique. In this work, we have reported b...
[BMIm]BF4-LiCl as an effective catalytic system for the synthesis of dicoumarols
A homogeneous ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate doped with LiCl ([BMIm]BF4-LiCl) was found as catalyst solvents for the synthesis of dicoumarols by the condensation of 4-hydroxycoumarin and aldeh...
A facile and efficient synthesis of Baclofen
γ-Aminobutiric acid (GABA), the major inhibitory neurotransmitter in the central nervous system is activated by the antispastic and muscle relaxant agent, Baclofen, which is a lipophilic derivative of GABA. Because of it...