Highly Efficient and Recyclable Catalyst HBF_4·SiO_2 Catalyzed Synthesis of β-Enamino Compounds Under Solvent-free Conditions

Fluoroboric acid adsorbed on silica-gel（HBF4·SiO2） has been found to be an extremely efficient and recyclable catalyst for the preparation of β-enaminones and β-enamino esters under solvent-free conditions.

4-甲磺酰基苯乙酸的合成工艺研究

目的对4-甲磺酰基苯乙酸的合成工艺进行改进,使其更利于工业化生产。方法以4-甲磺酰基苯乙酮为起始原料,在硅胶固载氟硼酸(HBF4·Si O2)的催化下,合成2-(4-(甲磺酰基)苯基)-1-吗啉代乙硫醇,再经水解得到4-甲磺酰基苯乙酸。结果制得的4-甲磺酰基苯乙酸质量分数为99.8%,总收率约75%。结论改进后的工艺原料便宜易得,反应温度低,时间短,操作简单,更适用于4-甲磺酰基苯乙酸工业化生产。