2-(Halomethyl)phenylacetic acid esters (3) which are useful as intermediates for producing agricultural fungicides are produced efficiently and conveniently by reacting a 3-isochromanone derivative (1) with a hydrogen halide and an alcohol or reacting (1) with a halomethyl alkyl ether and then reacting the product with an alcohol in the presence of a base. The starting compound, 3-isochromanone (1), is produced in good yield by reacting an α,α'-o-xylene dihalide (4) with carbon monoxide and water in an organic solvent in the presence of a palladium catalyst and an inorganic base and then treating the product with an acid.
通过将 3-异
色原酮衍
生物 (1) 与卤化氢和醇反应,或将 (1) 与卤代甲基烷基醚反应,然后在碱存在下将产物与醇反应,可以高效、方便地生产出可用作生产农用杀菌剂中间体的 2-(卤代甲基)
苯乙酸酯 (3)。在
钯催化剂和
无机碱存在下,在有机溶剂中使α,α'-
邻二甲苯二卤化物(4)与
一氧化碳和
水反应,然后用酸处理产物,可以制得收率很高的起始化合物
3-异色酮 (1)。