反应详情

A solution of hydrochloric acid (4.0 M in 1,4-dioxane, 2.1 mL, 8.2 mmol, 2 equiv) was added to a solution of (R)—N—((S)-1-(5-(4-chlorophenyl)isoxazol-3-yl)ethyl)-2-methylpropane-2-sulfinamide (1.34 g, 4.1 mmol) in 1,4-dioxane at room temperature. A precipitate formed. The suspension was stirred for 1 hour and then concentrated in vacuo to give the hydrochloride salt of (S)-1-(5-(4-chlorophenyl)isoxazol-3-yl)ethanamine (1.1 g, light yellow solid), which was used without purification. 1H NMR (400 MHz, CD3OD) δ 7.87 (d, J=8.8 Hz, 2H), 7.56 (d, J=8.8 Hz, 2H), 6.98 (s, 1H), 4.72 (q, J=6.9 Hz, 1H), 1.72 (d, J=7.0 Hz, 3H). MS m/z 223.1 (M+H)+; Rt-0.59 min.

1. customA precipitate formed
2. concentrationconcentrated in vacuo