2,4-二氯苯氧乙酸的后氯化法合成

The after—chlorination synthesis of 2,4-dichloro-phenoxyacetic acid

将苯酚与氢氧化钠成盐,然后与一氯乙酸的钠盐在碱性水溶液中缩合生成苯氧乙酸钠,再经氯化、酸化成2,4-二氯苯氧乙酸,收率可达95％。

2,4-dichlorophen oxyacetic acid was prepared by salt formation of phenol with sodium hydioxide, followed by the condensation with sodium chloroacetate in alkati solution to produce sodium phenoxy acetate, Subsequently, by the chlorination and acidulation. The yield reached to 95%.