Water → N-Benzyl-N-{(2R)-2-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-2-[(triethylsilyl)oxy]ethyl}amine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of {[(1R)-2-Bromo-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethyl]oxy}(triethyl)silane (130 g) and benzylamine (177 ml) in 1,4-dioxane (650 ml) was heated at 105° C. with stirring overnight. The mixture was then cooled to room temperature and water (150 ml) and diethyl ether (1200 ml) added. The layers were separated and the ethereal layer was washed with saturated ammonium chloride solution (3×600 ml), saturated sodium bicarbonate solution (200 ml) and then brine (200 ml). The solution was dried over anhydrous Na2SO4 before being filtered and concentrated under reduced pressure to give the title compound (129.9 g) as an oil, LC RT=5.20 min, δ (CDCl3) 7.22 (5H, m), 7.02 (1H, d, J 8.7 Hz), 6.86 (1H, s), 6.68 (1H, d, J 8.3 Hz), 4.75 (2H, s), 4.69 (1H, m), 3.73 (2H, s), 2.70 (2H, m), 1.46 (6H, s), 0.79 (9H, m), 0.44 (6H, m).

Herkunft & Nachweise