Water → (1R)-2-(benzylamino)-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethanol

関与物質

反応手順

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, 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).

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