反应详情

In THF (800 ml) was dissolved ethyl 5-bromo-4-chloro-2-methoxymethoxybenzoate (161.4 g). To the solution was added lithium aluminum hydride (19.2 g) at 0° C. over a period of 30 minutes, and the mixture was stirred for further 30 minutes. The reaction mixture was poured into a saturated aqueous saline solution, to which was added ethyl acetate, followed by subjecting the mixture to filtration with celite. The organic layer was washed with a saturated aqueous saline solution, dried (anhydrous magnesium sulfate), and concentrated. The concentrate was purified by means of a silica gel column chromatography (eluted with ethyl acetate/hexane) to give 5-bromo-4-chloro-2-methoxymethoxybenzyl alcohol (137.9 g) (Compound B-34). The physical properties are shown in Table 8.

1. additionThe reaction mixture was poured into a saturated aqueous saline solution, to which
2. filtrationto filtration with celite
3. washThe organic layer was washed with a saturated aqueous saline solution
4. dry with materialdried (anhydrous magnesium sulfate)
5. concentrationconcentrated
6. customThe concentrate was purified by means of a silica gel column chromatography (eluted with ethyl acetate/hexane)