33045-46-4Relevant academic research and scientific papers
Silica-supported 1,3-dichloro-5,5-dimethylhydantoin (DCH) as a useful reagent for microwave-assisted aromatization of 1,3,5-trisubstituted pyrazolines under solvent-free conditions
Azarifar, Davood,Nadimi, Elahe,Ghanbari, Mohammd Mehdi
experimental part, p. 447 - 450 (2012/02/01)
1,3,5-Trisubstituted pyrazolines are rapidly and conveniently oxidized to their corresponding pyrazoles by 1,3-dichloro-5,5-dimethylhydantoin (DCH) in solution and solvent-free conditions under microwave irradiation. The presence of silica gel as a suppor
Regioselective synthesis of multisubstituted pyrazoles via cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines
Jin, Weiwei,Yu, Haifeng,Yu, Zhengkun
experimental part, p. 5884 - 5887 (2011/12/02)
Multisubstituted pyrazoles were efficiently synthesized by cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines under relatively mild conditions. A one-pot synthetic protocol through tandem Liebeskind-Srogl cross-coupling/cyclocondensation using a-oxo ketene dithioacetals as the starting materials was also realized for the same purpose.
An efficient oxidation of 2-pyrazolines and isoxazolines by bis-bromine-1,4-diazabicyclo[2.2.2]octane complex (DABCO-Br2)
Azarifar, Davood,Khosravi, Kaveh,Veisi, Rahman-Ali
experimental part, p. 178 - 184 (2010/10/03)
An efficient and simple procedure has been developed for the oxidation of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles and -isoxazoles to their corresponding aromatic derivatives promoted by bis-bromine-1,4-diazabicyclo[2.2. 2]octane complex (DABCO-Brsu
Oxidative aromatization of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles efficiently by tetrabromine-1,3,5,7-tetrazatricyclo[3.3.1.13,7]decane complex, Br4-TATCD, as a novel reagent both under microwave irradiation and at room temper
Azarifar, Davood,Khosravi, Kaveh
experimental part, p. 43 - 46 (2010/04/05)
Oxidation of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles to the corresponding pyrazoles has been achieved by utilizing tetrabromine-1,3,5,7-tetrazatricyclo[3.3.1.13,7]decane complex, Br4-TATCD, in glacial acetic acid under microwav
Microwave-promoted aromatization of 1,3,5-trisubstituted 4,5-dihydro-ih-pyrazoles by calcium hypochlorite under solvent-free conditions
Azarifar, Davood,Gharshasbi, Azadeh
, p. 1209 - 1215 (2007/10/03)
An efficient microwave-promoted aromatization of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles using calcium hypochlorite [Ca(OCl)2] has been reported. The reaction proceeds very fast to give pyrazoles in good yields on irradiation of a mixture
