The method for producing the benzyl bromide derivatives of the formula:
wherein R1 represents a C1 to C5 alkyl group, which comprises reacting a 2-methylphenylacetic acid derivative of the formula:
wherein R1 represents the same meaning above, with bromine in the presence of an alkali metal salt.
In case that R1 is an ethyl or isopropyl group, the recrystallization of the above reaction product from aliphatic hydrocarbon solution gives the benzyl bromide derivatives efficiently and in high purity.
式中 R1 代表 C1 至 C5 烷基的
溴化苄基衍
生物的生产方法:
其中 R1 代表 C1 至 C5 烷基,包括使式 2-甲基
苯乙酸衍
生物与
溴在碱
金属盐存在下反应:
其中 R1 代表上述相同含义,在碱
金属盐存在下与
溴反应。
在 R1 为乙基或异丙基的情况下,从脂肪烃溶液中重结晶上述反应产物,可高效、高纯度地得到
溴化苄基衍
生物。