反应详情

2-Bromo-5-methoxypyridine (15.35 g) was successively treated with n-butyl lithium and 5-benzyloxy -2-methoxybenzaldehyde (16.47 g, Example 1(i)) under the conditions of Example 1(j). The crude carbinol (19.4 g) was treated with acetic anhydride and pyridine as described in Example 1(k). The product was purified by column chromatography on silica gel (550 g). Elution with petroleum spirit (60-80°)/ethyl acetate (2:1), then recrystallisation from dichloromethane/petroleum spirit gave 1-(3-benzyloxy-6-methoxyphenyl)-1-(5-methoxy-2-pyridyl)-methyl acetate (13.29 g, 50%), m.p. 105-110°.

1. customThe product was purified by column chromatography on silica gel (550 g)
2. washElution with petroleum spirit (60-80°)/ethyl acetate (2:1)
3. customrecrystallisation from dichloromethane/petroleum spirit