反应详情

To a solution of 2-amino-4'-benzyloxy-5-chloro-2'-methoxybenzophenone (10 g) in methanol (100 ml) was added sodium borohydride (1.4 g). After being stirred for 24 h, the mixture was concentrated in vacuo. The residue was diluted with water (200 ml) and extracted with ethyl acetate (300 ml). The extract was washed with water, dried over magnesium sulfate and concentrated in vacuo. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1-2:1) to give 2-amino-α-(4-benzyloxy-2-methoxyphenyl)-5-chlorobenzyl alcohol (9.5 g) as colorless crystals (mp=101°-103° C.).

1. concentrationthe mixture was concentrated in vacuo
2. additionThe residue was diluted with water (200 ml)
3. extractionextracted with ethyl acetate (300 ml)
4. washThe extract was washed with water
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated in vacuo
7. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1-2:1)