反应详情

Dichloromethane (10 ml) was added to methyl 2-(bromomethyl)-3-chlorobenzoate obtained in Example 10c (500 mg, 1.9 mmol), a 1.04 M diisobutylaluminum hydride/n-hexane solution (4.57 ml, 4.75 mmol) was added at −78° C., followed by stirring for one hour under a nitrogen atmosphere. A saturated aqueous Rochelle salt solution and tert-butyl methyl ether were added, followed by extraction with tert-butyl methyl ether. The organic layer was washed with brine, dried over magnesium sulfate and then allowed to pass through a silica gel pad. The eluate was concentrated to give the title compound (440 mg, yield 98.3%).

1. extractionfollowed by extraction with tert-butyl methyl ether
2. washThe organic layer was washed with brine
3. dry with materialdried over magnesium sulfate
4. concentrationThe eluate was concentrated