反应详情

To a solution of 4-benzyloxybutyric acid (20.59 mmol) in propan-2-ol (30 mL) under nitrogen at 0° C. was added dropwise thionyl chloride (22.65 mmol). The reaction mixture was allowed to reach room temperature over 30 minutes and stirred at room temperature during 20 hours. The mixture was concentrated under reduced pressure and co-evaporated with CH2Cl2. The crude was dried under vacuum pump to give the expected compound as yellow oil in quantitative yield. 1H NMR (CDCl3, 400 MHz) δ (ppm) 1.22 (d, J=6.26 Hz, 6H), 1.94 (quintuplet, J=6.70 Hz, 2H), 2.40 (t, J=7.47 Hz, 2H), 3.50-3.53 (m, 2H), 4.51 (s, 2H), 5 (heptuplet, J=6.22 Hz, 1H), 7.28-7.38 (m, 5H); MS (ESI) m/z=259.6 (MNa+).

1. concentrationThe mixture was concentrated under reduced pressure and co-evaporated with CH2Cl2
2. customThe crude was dried under vacuum pump