化学合成
化学合成
合成路线 1(1. 合成:32559-18-5)
产率:98%
合成条件:Stage #1: at -30℃; Stage #2: at 0 - 20℃; for 15 h;
实验步骤:甲基哌啶-2-羧酸盐酸盐的合成向3000mL三颈圆底烧瓶中加入CH 3 OH(1300mL)。将温度冷却至-30℃。在搅拌下向上述溶液中滴加SOCl 2(280mL),同时将温度保持在-30℃。向上述溶液中加入哌啶-2-羧酸(100g,分批冷却至0℃,同时使所得溶液在搅拌下反应15小时,同时将温度保持在室温。通过TLC(CH 3 OH加入几滴NH 3 H 2 O)监测反应进程。使用旋转蒸发器在真空下蒸发浓缩混合物。向其中加入甲苯(100mL),将温度保持在回流下。使用旋转蒸发器在真空下蒸发浓缩混合物。加入甲苯和浓缩的步骤重复两次。得到137g(98%)甲基哌啶-2-羧酸盐酸盐,为白色固体。
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