反应详情

To a solution of 4-iodoaniline (11.80 g, 53.9 mmol) and 3-(tetrahydro-pyran-2-yloxy)-benzaldehyde (11.68 g, 56.6 mmol) in 100 mL methylene chloride was added magnesium sulfate (64.9 g, 539 mmol). The reaction mixture was stirred in darkness under nitrogen at room temperature overnight. The magnesium sulfate was filtered off and replaced each day for 3 days. On the fourth day, the reaction mixture was filtered and concentrated in vacuo. The resulting residue (16.45 g) was dissolved in 100 mL ethanol and 50 mL methanol and was treated with sodium borohydride (7.68 g, 202.1 mmol) which was added in portions. The reaction mixture was stirred at room temperature for 4.5 hr. at which time saturated aqueous sodium bicarbonate was added. The reaction mixture was extracted with methylene chloride and the organic layer was dried (magnesium sulfate), filtered, and concentrated. Medium pressure silica gel chromatography of the residue (10% methanol/methylene chloride) afforded 6.81 g (41%) of the title compound of Step A.

1. filtrationThe magnesium sulfate was filtered off
2. waitreplaced each day for 3 days
3. filtrationOn the fourth day, the reaction mixture was filtered
4. concentrationconcentrated in vacuo
5. dissolutionThe resulting residue (16.45 g) was dissolved in 100 mL ethanol
6. additionwas added in portions
7. stirringThe reaction mixture was stirred at room temperature for 4.5 hr
8. extractionThe reaction mixture was extracted with methylene chloride
9. dry with materialthe organic layer was dried (magnesium sulfate)
10. filtrationfiltered
11. concentrationconcentrated