反应详情

温度

20 °C

a solution of 50 cm3 of 4N hydrochloric acid in dioxane is added, with stirring and at a temperature in the region of 20° C., to a solution of 4 g of tert-butyl N-[(1R,2S)-2-hydroxy-1-(4-pyridylmethyl)-butyl]carbamate in 50 cm3 of dioxane. The mixture is stirred at a temperature in the region of 20° C. for 18 hours and is then concentrated under reduced pressure (1 kPa) at a temperature in the region of 60° C. 3.6 g of (2R,3S)-2-amino-1-(4-pyridyl)-3-pentanol dihydrochloride are obtained in the form of a white solid [1H NMR spectrum (300 MHz, (CD3)2SO-d6, δ in ppm) 0.92 (t, J=7.5 Hz: 3H); from 1.30 to 1.65 (mt: 2H); 3.13 (dd, J=14 and 9 Hz: 1H); 3.28 (dd, J=14 and 5 Hz: 1H); 3.52 (mt: 1H); 3.68 (mt: 1H); 8.11 (broad d, J=6.5 Hz: 2H); 8.25 (unresolved complex: 3H); 8.90 (broad d, J=6.5 Hz: 2H) ].

1. concentrationis then concentrated under reduced pressure (1 kPa) at a temperature in the region of 60° C