111114-79-5Relevant academic research and scientific papers
One-pot synthesis of benzimidazoles and benzothiazoles in the presence of Fe(HSO4)3 as a new and efficient oxidant
Eshghi, Hossein,Rahimizadeh, Mohammad,Shiri, Ali,Sedaghat, Parisa
experimental part, p. 515 - 518 (2012/04/23)
A series of substituted benzimidazoles and benzothiazoles were prepared through the one-pot reaction of ophenylenediamine and o-aminothiophenol with various aldehydes in the presence of ferric hydrogensulfate both in EtOH and water as solvent. The reactions proceed smoothly in excellent yield, high chemoselectivity and with an easy work-up.
6-Nitrobenzimidazole derivatives: Potential phosphodiesterase inhibitors: Synthesis and structure-activity relationship
Khan,Shah, Zarbad,Ahmad,Ambreen,Khan,Taha,Rahim,Noreen,Perveen,Choudhary,Voelter
experimental part, p. 1521 - 1526 (2012/04/23)
6-Nitrobenzimidazole derivatives (1-30) synthesized and their phosphodiesterase inhibitory activities determined. Out of thirty tested compounds, ten showed a varying degrees of phosphodiesterase inhibition with IC50 values between 1.5 ± 0.043 and 294.0 ± 16.7 μM. Compounds 30 (IC50 = 1.5 ± 0.043 μM), 1 (IC50 = 2.4 ± 0.049 μM), 11 (IC50 = 5.7 ± 0.113 μM), 13 (IC50 = 6.4 ± 0.148 μM), 14 (IC50 = 10.5 ± 0.51 μM), 9 (IC50 = 11.49 ± 0.08 μM), 3 (IC50 = 63.1 ± 1.48 μM), 10 (IC50 = 120.0 ± 4.47 μM), and 6 (IC50 = 153.2 ± 5.6 μM) showed excellent phosphodiesterase inhibitory activity, much superior to the standard EDTA (IC50 = 274 ± 0.007 μM), and thus are potential molecules for the development of a new class of phosphodiesterase inhibitors. A structure-activity relationship is evaluated. All compounds are characterized by spectroscopic parameters.
Rapid and cheap synthesis of benzimidazoles via intermittent microwave promotion: A simple and potential industrial application of air as oxidant
Mao, Zhengzhou,Wang, Zhaoyang,Li, Jingning,Song, Xiumei,Luo, Yufen
experimental part, p. 1963 - 1977 (2010/09/07)
Using inexpensive KI as the catalyst in the presence of ambient air, benzimidazoles were synthesized from aromatic aldehydes and o-phenylenediamine with excellent yields via intermittent microwave irradiation without reflux equipment. The synthesis process was mild and only needed only a short reaction time (7-10min). As a simple example of the utilization of molecular oxygen under mild conditions, this method provides a novel way to synthesize benzimidazoles. The industrial synthesis of benzimidazoles may be realized by a cycle of microwave irradiation. Copyright
