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Polyvinylpolypyrrolidone-supported triflic acid (PVPP.OTf) has been used as a recyclable catalyst for synthesis of a series of 7-hydroxy-10-aryl-10H-indeno[1,2-b]chromen-11-one derivatives by condensation of aldehydes, resorcinol, and 2H-indene-1,3-dione. 13-Phenylindeno[1,2-b]naphtho[1,2-e]pyran-12(13H)-one and 12-phenyl-12H-indeno[1,2-b]naphtho[3,2-e]pyran-5,11,13-trione were also synthesized by condensation of benzaldehyde, β-naphthol or 2-hydroxynaphthalene-1,4-dione, and 2H-indene-1,3-dione with PVPP.OTf as catalyst. The heterogeneous catalyst was used for four runs. This method has the advantages of high yields, simple methodology, short reaction times, and easy work-up. © 2015 Springer Science+Business Media Dordrecht. Source


Shafiee M.R.M.,Islamic Azad University at Najafabad | Mansoor S.S.,Bioactive Organic Molecule Synthetic Unit | Ghashang M.,Islamic Azad University at Najafabad | Fazlinia A.,Islamic Azad University
Comptes Rendus Chimie | Year: 2014

Various derivatives of 3,4,5-substituted furan-2(5H)-ones have been readily prepared by using aluminum hydrogen sulfate [Al(HSO4)3] as an efficient catalyst in good yields and milder reaction conditions. The versatility of this protocol has been demonstrated with various substituted furan-2(5H)-ones. © 2013 Académie des sciences. Source


Mansoor S.S.,Bioactive Organic Molecule Synthetic Unit | Ghashang M.,Islamic Azad University at Najafabad | Aswin K.,Bioactive Organic Molecule Synthetic Unit
Research on Chemical Intermediates | Year: 2015

Tribromomelamine, has been used as an efficient, inexpensive, and green catalyst for one-pot, three-component synthesis of 7-aryl-8H-benzo[h]indeno[1,2-b]quinoline-8-ones by reaction of 1,3-indanedione, aromatic aldehydes, and 1-naphthylamine under solvent-free conditions. The several advantages of this reaction include high yields, short reaction time, and high catalyst efficiency. © 2014 Springer Science+Business Media Dordrecht. Source


Ghashang M.,Islamic Azad University at Najafabad | Aswin K.,Bioactive Organic Molecule Synthetic Unit | Mansoor S.S.,Bioactive Organic Molecule Synthetic Unit
Research on Chemical Intermediates | Year: 2014

A facile and environmentally benign synthesis of some 2-amino-6-(2-oxo-2H- chromen-3-yl)-4-arylnicotinonitrile derivatives from the reaction of 3-acetylcoumarin, aromatic aldehydes, and malononitrile under solvent-free condition in the presence of silica-supported perchloric acid (HClO 4-SiO2) is described. The ability to reuse the catalyst, the high yields, and ease of purification are the important features of this process. © Springer Science+Business Media Dordrecht 2013. Source


Ghashang M.,Islamic Azad University at Najafabad | Mansoor S.S.,Bioactive Organic Molecule Synthetic Unit | Aswin K.,Bioactive Organic Molecule Synthetic Unit
Research on Chemical Intermediates | Year: 2015

Abstract Efficient synthesis of a novel series of 11-amino-12-aryl-hexahydro-5-oxa-6,13-diaza-indeno[1,2-b]anthracene derivatives has been achieved by cyclocondensation of 2-amino-4,5-dihydro-4-arylpyrano[3,2-b]indole-3-carbonitriles and cyclohexanone in the presence of silica gel-supported aluminium chloride (SiO2-AlCl3) as catalyst under thermal conditions. Thorough optimization of the experimental conditions enabled significant rate enhancement and excellent yields. The starting 2-amino-4,5-dihydro-4-arylpyrano[3,2-b]indole-3-carbonitriles were obtained by one-pot triphenylphosphine-catalyzed multicomponent condensation of 3-hydroxyindole, malononitrile, and aromatic aldehydes. The structures of all the synthesized compounds were established by use of advanced spectroscopic techniques. © 2014 Springer Science+Business Media Dordrecht. Source

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