反应详情

Tetrabutylammonium fluoride (395 ml, 1M in THF) was added dropwise to a stirred solution of N-benzyl-N-{(2R)-2-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-2-[(triethylsilyl)oxy]ethyl}amine (129.9 g) in THF (900 ml) at 5° C. Upon complete addition the reaction mixture was maintained at this temperature for 15 min before water (600 ml) was added. The resulting slurry was diluted with diethyl ether (500 ml) and filtered. The filtrate was washed with water (2×500 ml) and brine (500 ml) before being dried over anhydrous Na2SO4. The resulting mixture was filtered and concentrated under reduced pressure to give a solid which was triturated with diisopropyl ether to give the title compound (70 g) as a solid, LC RT=3.34 min, δ (CDCl3) 7.31 (5H, m), 7.09 (1H, d, J 8 Hz), 6.98 (1H, s), 6.77 (1H, d J 8 Hz), 4.82 (2H, s), 4.63 (1H, m), 3.83 (2H, d, J 4 Hz), 2.80 (2H, m), 1.52 (6H, s).

1. additionUpon complete addition the reaction mixture
2. additionwas added
3. filtrationfiltered
4. washThe filtrate was washed with water (2×500 ml) and brine (500 ml)
5. dry with materialbefore being dried over anhydrous Na2SO4
6. filtrationThe resulting mixture was filtered
7. concentrationconcentrated under reduced pressure
8. customto give a solid which
9. customwas triturated with diisopropyl ether