反应详情

Thionyl chloride (108 g) is slowly added during 1 hour to a stirred mixture of 2,5-dimethoxybenzyl alcohol (150 g), 2,4,6-collidine (108 g), and methylene chloride (750 ml) at room temperature. The reaction is slightly exothermic. After stirring for another 30 minutes, the mixture is washed with hydrochloric acid (2 N) and water and then dried (MgSO4). Evaporation gives a residue of 2,5-dimethoxybenzyl chloride which crystallizes (127 g).

1. washthe mixture is washed with hydrochloric acid (2 N) and water
2. dry with materialdried (MgSO4)
3. customEvaporation