ene in a continuous-flow reactor in 98% yield is described. The continuous-flow mononitration ran well in adiabatic condition with 80 wt% sulfuric acid, and residence time was reduced to 5 s. The short residence time can significantly reduce byproducts. Dinitration was also studied for optimization of the mononitration. The spent acid could be reused for several times after concentration in a vacuum
描述了一种在连续流动反应器中以98%的收率选择性硝化1-甲基-4-(甲基磺酰基)苯的快速方法。连续流单硝化在绝热条件下用80 wt%的
硫酸进行得很好,并且停留时间减少到5 s。短的停留时间可以显着减少副产物。还研究了滴定法以优化单硝化作用。废酸在真空浓缩后可以重复使用几次。