The use of easily recoverable tri-n-butylphosphoniummethylated polystyrene resin (phosphonium resin catalyst) under triphasic reaction conditions was proposed in Williamson's alkyl aryl ether synthesis. O-Methylation of 2-tert-butyl-5-methylphenol with methyl chloride was easily carried out in the presence of the phosphonium resin catalyst under basic conditions to give 2-tert-butyl-5-methylphenyl methyl ether in excellent yield. A few other phenols were also O-alkylated under similar triphasic reaction conditions to give alkyl aryl ethers.
在Williamson烷基芳基醚合成中,提出在三相反应条件下使用易回收的
三丁基膦甲基聚
苯乙烯树脂(膦
树脂催化剂)。在碱性条件下,利用膦
树脂催化剂,可以容易地进行2-叔丁基-5-甲基
苯酚与
甲基氯的O-甲基化反应,得到高产率的2-叔丁基-5-甲基苯基
甲醚。还有其他几种
酚在类似的三相反应条件下也进行了O-烷基化反应,得到了烷基芳基醚。