A simple and efficient method for the iodination of aromatic compounds has been achieved in the presence of iodine and 1,4- bis（triphenylphosphonium）-2-butene peroxodisulfate.
A new solvent free method for protection of carbonyl compounds as their thioacetals has been accomplished through the use of iodine supported on nanostructured pyrophosphate. Advantages of the methodology include very...A new solvent free method for protection of carbonyl compounds as their thioacetals has been accomplished through the use of iodine supported on nanostructured pyrophosphate. Advantages of the methodology include very short reaction time, the requirement for minimum amounts of catalyst, the remarkably simple experimental procedure, and no necessity for solvents or inert atmospheres, excellent yields and recyclability of the catalyst used. An efficient method for the chemoselective thioacetalization of ketones in the presence of aldehydes using I2/nanostructured pyrophosphate is also reported in this article. The nanostructured pyrophosphate was characterized by scanning electron microscopy, X-ray diffraction, infrared spectroscopy, Transmission electron microscopy and thermal gravimetric analysis, respectively.展开更多
Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW...Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW12O40 in refluxing CH2Cl2 to afford the corresponding iodinated arenes.展开更多
Potassium ferrate impregnated on montmorillonite is a mild,cheap,and non-toxic reagent for the iodination of phenols, including naphthol,aromatic amines,and heterocyclic substrates in fair to excellent yields by a sim...Potassium ferrate impregnated on montmorillonite is a mild,cheap,and non-toxic reagent for the iodination of phenols, including naphthol,aromatic amines,and heterocyclic substrates in fair to excellent yields by a simple isolation procedure.展开更多
AIM: To study the treatment effect of chronic pharyngitis using radiofrenquency and compound iodine glycerin. METHODS: If the patients were diagnosed as chronic simple pharyngitis and atrophic pharyngitis or pharyngit...AIM: To study the treatment effect of chronic pharyngitis using radiofrenquency and compound iodine glycerin. METHODS: If the patients were diagnosed as chronic simple pharyngitis and atrophic pharyngitis or pharyngitis sicca,they were treated with smearing compound iodine glycerin on the back wall of pharynx, combining with general treatment. If the patients were diagnosed as chronic hypertrophic pharyngitis, they were treated with radiofrenquency, combining with general treatment. The control groups were only treated with general treatment. RESULTS: Half a month post treatment, 268 cases were recovered (82.0%) among 327 patients; 56 cases were better (17.1%). In the control groups, 62 cases were healed (62.0%). The effect of the treatment using radiofrenquency or compound iodine glycerin is significantly better than that in the control groups (P<0.0001). CONCLUSION: Treatment of chronic simple pharyngitis and atrophic pharyngitis or pharyngitis sicca with smearing compound iodine glycerin on the back wall of pharynx, and the treatment of chronic hypertrophic pharyngitis using radiofrenquency are more effective than routine method. Their advantages are local treatment, accurate localization, simple process, short therapy duration, no bleeding and pain, higher cure rate.展开更多
文摘A simple and efficient method for the iodination of aromatic compounds has been achieved in the presence of iodine and 1,4- bis（triphenylphosphonium）-2-butene peroxodisulfate.
文摘A new solvent free method for protection of carbonyl compounds as their thioacetals has been accomplished through the use of iodine supported on nanostructured pyrophosphate. Advantages of the methodology include very short reaction time, the requirement for minimum amounts of catalyst, the remarkably simple experimental procedure, and no necessity for solvents or inert atmospheres, excellent yields and recyclability of the catalyst used. An efficient method for the chemoselective thioacetalization of ketones in the presence of aldehydes using I2/nanostructured pyrophosphate is also reported in this article. The nanostructured pyrophosphate was characterized by scanning electron microscopy, X-ray diffraction, infrared spectroscopy, Transmission electron microscopy and thermal gravimetric analysis, respectively.
文摘Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW12O40 in refluxing CH2Cl2 to afford the corresponding iodinated arenes.
基金the Islamic Azad University of Qaemshahr for financial support
文摘Potassium ferrate impregnated on montmorillonite is a mild,cheap,and non-toxic reagent for the iodination of phenols, including naphthol,aromatic amines,and heterocyclic substrates in fair to excellent yields by a simple isolation procedure.
文摘AIM: To study the treatment effect of chronic pharyngitis using radiofrenquency and compound iodine glycerin. METHODS: If the patients were diagnosed as chronic simple pharyngitis and atrophic pharyngitis or pharyngitis sicca,they were treated with smearing compound iodine glycerin on the back wall of pharynx, combining with general treatment. If the patients were diagnosed as chronic hypertrophic pharyngitis, they were treated with radiofrenquency, combining with general treatment. The control groups were only treated with general treatment. RESULTS: Half a month post treatment, 268 cases were recovered (82.0%) among 327 patients; 56 cases were better (17.1%). In the control groups, 62 cases were healed (62.0%). The effect of the treatment using radiofrenquency or compound iodine glycerin is significantly better than that in the control groups (P<0.0001). CONCLUSION: Treatment of chronic simple pharyngitis and atrophic pharyngitis or pharyngitis sicca with smearing compound iodine glycerin on the back wall of pharynx, and the treatment of chronic hypertrophic pharyngitis using radiofrenquency are more effective than routine method. Their advantages are local treatment, accurate localization, simple process, short therapy duration, no bleeding and pain, higher cure rate.
