115722-00-4Relevant articles and documents
TEMPO supported amine functionalized magnetic titania: a magnetically recyclable catalyst for the aerobic oxidative synthesis of heterocyclic compounds
Sharma, Sukanya,Choudhary, Anu,Sharma, Shally,Shamim, Tahira,Paul, Satya
, p. 83 - 94 (2021)
Abstract: The present protocol uncover a new strategy to synthesize highly efficient solid TEMPO based catalyst in which 4-oxo-TEMPO was covalently tethered to the surface of amine functionalized magnetic titania. The chemical nature and structure of the
Rapid and efficient oxidation of Hantzsch 1,4-dihydropyridines with sodium periodate catalyzed by manganese (III) Schiff base complexes
Nasr-Esfahani, Masoud,Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah,Momeni, Ahmad Reza
, p. 2720 - 2724 (2006)
Rapid and efficient oxidation of Hantzsch 1,4-dihydropyridine with sodium periodate is reported. The Mn(III)-salophen/NaIO4 catalytic system converts 1,4-dihydropyridines to their corresponding pyridine derivatives at room temperature in a 1:1,
Aromatization of 1,4-dihydropyridines in the presence of toluenesulfonyl choloride/NaNO2/WET-SiO2 under microwave irradiation
Niknam, Khodabakhsh,Zolfigol, Mohammah Ali,Rabani, Farideh
, p. 183 - 186 (2006)
A combination of toluenesulfonyl chloride and sodium nitrite in the presence of wet SiO2 was used as an effective oxidizing agent for the aromatization of 1,4-dihydropyridines to the corresponding pyridine derivatives under microwave irradiatio
Tungstate sulfuric acid/ KMnO4 as a novel heterogeneous system for the rapid aromatization of hantzsch 1, 4-dihydropyridines under mild conditions
Karami, Bahador,Montazerozohori, Morteza,Habibi, Mohammad Hossein,Zolfigol, Mohammad Ali
, p. 513 - 516 (2005)
Neat chlorosulfonic acid reacts with anhydrous sodium tungstate to give tungstate sulfuric acid (TSA) as a new two basic inorganic solid acid in which two sulfuric acid connect to tungstate moiety via covalent bond. Hantzsch 1, 4-dihydro pyridines (1, 4-D
Oxidation of Hantzsch esters, by means of the new HNO3/bentonite system, and irradiation in a microwave oven
Garcia,Delgado,Cano,Alvarez
, p. 623 - 625 (1993)
We report the aromatization of 1,4-dihydropyridines on using the system HNO3/Bentonite in absence of solvent, by irradiation of the samples in a microwave oven, obtaining excellent yields on very short times comparing with the normal procedures.
Biomimetic oxidation of Hantzsch 1,4-dihydropyridines with tetra-n-butylammonium periodate catalyzed by tetraphenylporphyrinatomanganese(III) chloride [Mn(TPP)Cl]
Nasr-Esfahani, Masoud,Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah
, p. 3276 - 3278 (2005)
Efficient oxidation of Hantzsch 1,4-dihydropyridines to their corresponding pyridine derivatives with (Bu4N)IO4 catalyzed by tetraphenylporphyrinatomanganese(III) chloride [Mn(TPP)Cl] is reported. This catalytic system shows high eff
Efficient oxidation of Hantzsch 1,4-dihydropyridines with nicotinium dichromate
Sadeghi,Mohammadpoor-Baltork,Memarian,Sobhani
, p. 1661 - 1665 (2000)
A convenient method for the oxidation of various 4-substituted Hantzsch 1,4-dihydropyridines with nicotinium dichromate (NDC) in refluxing acetonitrile is reported. The yields obtained are excellent.
Chemoselective oxidation of 1,4-dihydropyridines with [NO+.Crown.H(NO3)2-]
Zolfigol, Mohammad Ali,Zebarjadian, Mohammad Hassan,Sadegh, Majid M.,Mohammadpoor-Baltork, Iraj,Memarian, Hamid Reza,Shamsipur, Mojtaba
, p. 929 - 934 (2001)
An ionic complex has been obtained from N2O4 in the presence of the macrocyclic ether 18-crown-6. This crystalline compound was used as an effective oxidizing agent for the oxidation of dihydropyridines to their corresponding pyridin
Application of silica vanadic acid [SiO2-VO(OH)2] as a heterogeneous and recyclable catalyst for oxidative aromatization of Hantzsch 1,4-dihydropyridines at room temperature
Safaiee, Maliheh,Zolfigol, Mohammad Ali,Tavasoli, Mahsa,Mokhlesi, Mohammad
, p. 1593 - 1597 (2014)
A simple method for the oxidative aromatization of Hantzsch 1,4-dihydropyridines to the corresponding pyridines is described using hydrogen peroxide as green oxidant and silica vanadic acid as catalyst in acetonitrile at room temperature. The catalyst can
Catalytic aromatization of hantzsch 1, 4-dihydropyridines by bis (salicylaldehyde-1, 2-phenylenediimine) Mn (III) chloride using urea hydrogen peroxide as mild and efficient oxidant
Karami, Bahador,Montazerozohori, Morteza,Nasr-Esfahani, Masoud
, p. 2181 - 2188 (2005)
A variety of Hantzsch 1,4-dihyropyridines were oxidized efficiently by a catalytic amount of bis(salicylaldehyde-1,2-phenylenediimine)Mn(III) chloride (Mn(III)-salophen I) in the presence of urea hydrogen peroxide adduct (UHP II) as convenient and mild ox