反应详情

温度

160 °C

A mixture of 1-(4-chloromethyl-5-methyl-1,3-thiazol-2-yl)piperidine (2.7 g) and triethyl phosphite (1.5 g) was stirred at 160° C. for 20 hrs. Excess triethyl phosphite was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography and eluted with ethyl acetate-hexane (2:1, v/v), then ethyl acetate-methanol (10:1, v/v) to give diethyl {[5-methyl-2-(piperidin-1-yl)-1,3-thiazol-4-yl]methyl}phosphonate as a brown oil (1.4 g, yield 35%). NMR (CDCl3) δ: 1.29 (6H, t, J=7.1 Hz), 1.53-1.74 (6H, m), 2.24 (3H, d, J=4.1 Hz), 3.10 (2H, d, J=20.9 Hz), 3.28-3.46 (4H, m), 4.00-4.21 (4H, m).

1. customExcess triethyl phosphite was evaporated under reduced pressure
2. washeluted with ethyl acetate-hexane (2:1