采用溴化钾与浓硫酸的方法合成溴代正丁烷,重点考察了反应条件对合成的影响,实验结果表明:当正丁醇用量为0.17mol,溴化钾与正丁醇的摩尔比为1∶0.89且浓硫酸追加量为17 m L,回流反应5 h后,溴代正丁烷的产率为88.9%。本合成方法不但使物...采用溴化钾与浓硫酸的方法合成溴代正丁烷,重点考察了反应条件对合成的影响,实验结果表明:当正丁醇用量为0.17mol,溴化钾与正丁醇的摩尔比为1∶0.89且浓硫酸追加量为17 m L,回流反应5 h后,溴代正丁烷的产率为88.9%。本合成方法不但使物料循环利用,而且减少了对环境的污染。展开更多
A convenient and selective catalytic method for the sulfoxidation of aliphatic and aromatic sulfides by treatment of NH4NO3, silica sulfuric acid, wet SiO2 (50% w/w) and a catalytic amount of KBr in CH2Cl2 at room tem...A convenient and selective catalytic method for the sulfoxidation of aliphatic and aromatic sulfides by treatment of NH4NO3, silica sulfuric acid, wet SiO2 (50% w/w) and a catalytic amount of KBr in CH2Cl2 at room temperature was developed. Many sulfides can be selec-tively oxidized at room temperature in good to excellent yields. The reaction proceeds without over-oxidation to sulfones under mild conditions.展开更多
基金Supported by the Center of Excellence of Development of Chemical Methods(CEDCM)of Bu-Ali Sina University,Iran.
文摘A convenient and selective catalytic method for the sulfoxidation of aliphatic and aromatic sulfides by treatment of NH4NO3, silica sulfuric acid, wet SiO2 (50% w/w) and a catalytic amount of KBr in CH2Cl2 at room temperature was developed. Many sulfides can be selec-tively oxidized at room temperature in good to excellent yields. The reaction proceeds without over-oxidation to sulfones under mild conditions.
