Ten N (4 substituted pyrimidin 2 yl) 2 trifluoroacetylamino benzenesulfonylureas were synthesized. Their structures were confirmed by elemental analysis and 1H NMR. Some of the compounds showed good herbicidal act...Ten N (4 substituted pyrimidin 2 yl) 2 trifluoroacetylamino benzenesulfonylureas were synthesized. Their structures were confirmed by elemental analysis and 1H NMR. Some of the compounds showed good herbicidal activity.展开更多
在二氯乙烷溶剂中采用N,N-二甲基甲酰胺作催化剂,苯磺酸钠与双(三氯甲基)碳酸酯(BTC)反应制备苯磺酰氯,然后肼解得到苯磺酰肼.研究了催化剂、溶剂和BTC用量对苯磺酰氯收率的影响,优化条件下氯化反应收率为90.8%;此外,对肼解反应滴加温...在二氯乙烷溶剂中采用N,N-二甲基甲酰胺作催化剂,苯磺酸钠与双(三氯甲基)碳酸酯(BTC)反应制备苯磺酰氯,然后肼解得到苯磺酰肼.研究了催化剂、溶剂和BTC用量对苯磺酰氯收率的影响,优化条件下氯化反应收率为90.8%;此外,对肼解反应滴加温度和反应温度对苯磺酰肼收率的影响进行了考察.优化条件下,苯磺酰肼两步总收率81.9%,其结构经1 H NMR和IR表征确认.采用BTC代替三氯氧磷作氯化试剂,操作安全,并可避免含磷废水对环境的影响,是一种绿色环保的工艺.展开更多
文摘Ten N (4 substituted pyrimidin 2 yl) 2 trifluoroacetylamino benzenesulfonylureas were synthesized. Their structures were confirmed by elemental analysis and 1H NMR. Some of the compounds showed good herbicidal activity.
文摘在二氯乙烷溶剂中采用N,N-二甲基甲酰胺作催化剂,苯磺酸钠与双(三氯甲基)碳酸酯(BTC)反应制备苯磺酰氯,然后肼解得到苯磺酰肼.研究了催化剂、溶剂和BTC用量对苯磺酰氯收率的影响,优化条件下氯化反应收率为90.8%;此外,对肼解反应滴加温度和反应温度对苯磺酰肼收率的影响进行了考察.优化条件下,苯磺酰肼两步总收率81.9%,其结构经1 H NMR和IR表征确认.采用BTC代替三氯氧磷作氯化试剂,操作安全,并可避免含磷废水对环境的影响,是一种绿色环保的工艺.
