Boc-L-丝氨酸甲酯可作为有机合成中间体和医药中间体,主要用于实验室研发过程和化工生产过程中。制备:将3.1kgL-丝氨酸溶于30L甲醇之中,室温下加入氯化亚砜2.2L,加完后搅拌2h再升温回流8小时,将反应液浓缩旋干,将浓缩液溶于30L二氯甲烷,加入9.2L三乙胺和7.25kg二碳酸二叔丁酯,冰水冷却,控制温度不超过20℃,加毕,室温搅拌8h,将反应液用1N硫酸氢钠溶液、5%碳酸氢钠溶液、10%柠檬酸和饱和食盐水洗涤,有机相用无水硫酸钠干燥,减压去溶剂得化合物Ⅰ6.38kg,产率94%。
化学合成;生命科学;医药中间体
合成路线 1(1. 合成:2766-43-0)
- 步骤: 将粗制的(5)- 2-氨基-3-羟基丙酸甲酯盐酸盐(0.29mol)悬浮在DCM(200mL)中并向该混合物中加入三乙胺(79mL,0.57mol)和Boc 2 O(68g,0.31mol)。在0°C。移去冷却浴,将反应混合物在环境温度下搅拌过夜,然后用MTBE(300mL)稀释。过滤混合物,减压浓缩滤液。通过硅胶快速柱色谱法纯化残余物,得到(5)-2-((叔丁氧基羰基)氨基)-3-羟基丙酸甲酯(60g,94%收率),为无色油状物。
- 条件: With triethylamine In dichloromethane at 0 - 20℃;
- 产率: 94%
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