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A mixture of 41.6 g of phosphorus tribromide, 25 ml of benzene and 8.2 ml of pyridine is prepared while cooling and while stirring it is treated dropwise at a maximum temperature of 10° C. with 108.3 g of 5-chloro-2-iodobenzyl alcohol. Then, it is stirred for 4 hours at room temperature and for 1 hour at 50° C. After cooling, it is diluted with 120 ml of chloroform, the mixture washed with 25 ml of 5% hydrochloric acid, a 5% sodium hydroxide solution and with water, dried with magnesium sulfate and evaporated. There are obtained 126 g (95%) of crude 5-chloro-2-iodobenzyl bromide melting at 75°-79° C. The pure product is obtained by crystallization from a mixture of benzene and petroleum ether, m.p. 77°-79° C.

1. customis prepared
2. temperaturewhile cooling
3. stirringThen, it is stirred for 4 hours at room temperature and for 1 hour at 50° C
4. temperatureAfter cooling
5. washthe mixture washed with 25 ml of 5% hydrochloric acid
6. dry with materiala 5% sodium hydroxide solution and with water, dried with magnesium sulfate
7. customevaporated