Poly(4-vinylpyridinium)hydrogen sulfate: A novel and efficient catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under conventional heating and ultrasound irradiation
A simple and convenient procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes is described through a one-pot condensation of 2-naphthol with aryl aldehydes in the presence of poly(4-vinylpyridinium)hydrogen sulfate as an efficient, cheap, readily synthesized and eco-friendly catalyst in a solvent free media using conventional heating and ultrasound irradiation. (C) 2011 Elsevier B.V. All rights reserved.
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Department of Chemistry,Ferdowsi University of Mashhad,Mashhad 91775-1436,IranDepartment of Chemistry,Ferdowsi University of Mashhad,Mashhad 91775-1436,Iran
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Indian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, India
Das, Biswanath
Ravikanth, B.
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Indian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, India
Ravikanth, B.
Ramu, R.
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Indian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, India
Ramu, R.
Laxminarayana, K.
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Indian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, India
Laxminarayana, K.
Rao, B. Vittal
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Indian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Chem Div 1, Hyderabad 500007, Andhra Pradesh, India