36755-90-5Relevant academic research and scientific papers
Efficient multi-component synthesis of highly substituted imidazoles utilizing P2O5/SiO2 as a reusable catalyst
Shaterian, Hamid Reza,Ranjbar, Mohammad,Azizi, Kobra
experimental part, p. 1635 - 1645 (2012/01/06)
Phosphorus pentoxide supported on silica gel (P2O 5/SiO2) has been used as an efficient and reusable catalyst for the one-pot pseudo four-component synthesis of 2,4,5-trisubstituted imidazoles from benzil or benzoin, aldehydes, and ammonium acetate. It was also used for four-component preparation of 1,2,4,5-tetrasubstituted imidazoles from benzil or benzoin, aldehydes, primary amine, and ammonium acetate under thermal solvent-free conditions. The remarkable features of this new procedure are high conversions, cleaner reaction, simple experimental and work-up procedures and also the catalyst can be easily separated from the reaction mixture and reused several times without any loss of its activity.
Synthesis of highly substituted imidazoles using Bronsted acidic ionic liquid, triphenyl(propyl-3-sulphonyl)phosphonium toluenesulfonate, as reusable catalyst
Shaterian,Ranjbar,Azizi
experimental part, p. 1120 - 1134 (2012/02/04)
Bronsted acidic ionic liquid, triphenyl(propyl-3-sulphonyl) phosphonium toluenesulfonate, has been used as an efficient and reusable catalyst for the one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under solvent-free conditions in excellent yields.
An environmental friendly approach for the synthesis of highly substituted imidazoles using Br?nsted acidic ionic liquid, N-methyl-2-pyrrolidonium hydrogen sulfate, as reusable catalyst
Shaterian, Hamid Reza,Ranjbar, Mohammad
experimental part, p. 40 - 49 (2012/03/09)
Br?nsted acidic ionic liquid, N-methyl-2-pyrrolidonium hydrogen sulfate, has been used as an efficient and reusable catalyst for the one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under thermal solvent-free conditions in excellent yields.
Silica-bonded S-sulfonic acid: A recyclable catalyst for the synthesis of trisubstituted imidazoles under solvent-free conditions
Niknam, Khodabakhsh,Mohammadizadeh, Mohammad R.,Mirzaee, Salimeh,Saberi, Dariush
experimental part, p. 663 - 669 (2010/10/19)
Trisubstituted imidazoles have been synthesized in high yields in the presence of silica-bonded S-sulfonic acid as a catalyst. The reaction was carried out at 130 °C under solvent-free conditions. The reaction work-up is simple and the catalyst is easily separated from the products by filtration.
Potassium aluminum sulfate (alum): An efficient catalyst for the one-pot synthesis of trisubstituted imidazoles
Mohammadi, Ali A.,Mivechi, Mersede,Kefayati, Hassan
experimental part, p. 935 - 937 (2009/09/25)
Trisubstituted imidazoles were synthesized in high yields in the presence of potassium aluminum sulfate (alum) as a non-toxic, reusable, inexpensive, and easily available reagent at 70°C.
