从5-氯-1-茚酮出发,用碳酸二甲酯(DMC)代替传统的有毒有害试剂作为甲氧羰基化试剂兼作溶剂,在NaH作用下,一步合成了5-氯-2-甲氧羰基-1-茚酮。考察了原料摩尔比、反应温度、滴加时间对产品质量和收率的影响。确定了最佳反应条件:n(5-氯-1...从5-氯-1-茚酮出发,用碳酸二甲酯(DMC)代替传统的有毒有害试剂作为甲氧羰基化试剂兼作溶剂,在NaH作用下,一步合成了5-氯-2-甲氧羰基-1-茚酮。考察了原料摩尔比、反应温度、滴加时间对产品质量和收率的影响。确定了最佳反应条件:n(5-氯-1-茚酮)∶n(NaH)=1∶3,反应温度90℃,滴加时间30 m in,收率达到86.09%。所得产品的结构经FTIR、1HNMR1、3CNMR和MS进行了表征。已在浙江宏元医药化工有限公司实施中试开发。展开更多
A novel titanium-supported nanoporous network platinum electrode(nanoPt)with a enormous surface area was successfully fabricated with successive hydrothermal electrolytic processes.It was shown from cyclic voltammogra...A novel titanium-supported nanoporous network platinum electrode(nanoPt)with a enormous surface area was successfully fabricated with successive hydrothermal electrolytic processes.It was shown from cyclic voltammograms in alkaline solutions that current densities during the oxidation of formic acid on the nanoPt were much higher than those on a polycrystalline platinum(Pt),and that the oxidation peak current density on the nanoPt was almost 100 times higher than on Pt.It was observed from chrono potentiometric measurements that steady-state current densities on the nanoPt were also much higher than on Pt.Oscillatory behavior was observed both on Pt and on the nanoPt electrodes,but the linear galvanic voltammograms showed that oscillation arose in a much wider range of current densities on the nanoPt than on Pt.This novel nanoporous platinum electrode could be used repeatedly and its electrocatalytic activity was stable significantly.It would be a promising anodic material used in fuel cells.展开更多
文摘从5-氯-1-茚酮出发,用碳酸二甲酯(DMC)代替传统的有毒有害试剂作为甲氧羰基化试剂兼作溶剂,在NaH作用下,一步合成了5-氯-2-甲氧羰基-1-茚酮。考察了原料摩尔比、反应温度、滴加时间对产品质量和收率的影响。确定了最佳反应条件:n(5-氯-1-茚酮)∶n(NaH)=1∶3,反应温度90℃,滴加时间30 m in,收率达到86.09%。所得产品的结构经FTIR、1HNMR1、3CNMR和MS进行了表征。已在浙江宏元医药化工有限公司实施中试开发。
文摘A novel titanium-supported nanoporous network platinum electrode(nanoPt)with a enormous surface area was successfully fabricated with successive hydrothermal electrolytic processes.It was shown from cyclic voltammograms in alkaline solutions that current densities during the oxidation of formic acid on the nanoPt were much higher than those on a polycrystalline platinum(Pt),and that the oxidation peak current density on the nanoPt was almost 100 times higher than on Pt.It was observed from chrono potentiometric measurements that steady-state current densities on the nanoPt were also much higher than on Pt.Oscillatory behavior was observed both on Pt and on the nanoPt electrodes,but the linear galvanic voltammograms showed that oscillation arose in a much wider range of current densities on the nanoPt than on Pt.This novel nanoporous platinum electrode could be used repeatedly and its electrocatalytic activity was stable significantly.It would be a promising anodic material used in fuel cells.
