Disclosed are methods for preparing compounds of Formula 1 and 1A. The first method utilizes a benzyl carbamate amine protecting group and an intermediate of Formula 4. The second method utilizes a tert-butyl carbamate amine protecting group and an intermediate of Formula 7. The third method utilizes a dibenzyl amine protecting group. Also disclosed is a compound, phenylmethyl N-[2-oxo-2-[(2,2,2-trifluoroethyl)amino]ethyl]carbamate (a compound of Formula 4). Further disclosed is a method for preparing a compound of Formula 14 from a compound of Formula 15 and a compound of Formula 1 or 1A.
本发明涉及制备式1和1A化合物的方法。第一种方法利用苄基
氨基羰酸酯保护基和式4的中间体。第二种方法利用叔丁基
氨基羰酸酯保护基和式7的中间体。第三种方法利用
二苄胺保护基。还公开了一种化合物,苯甲基N-[2-氧代-2-[(
2,2,2-三氟乙基)
氨基]乙基]
氨基甲酸酯(式4的化合物)。此外,还公开了一种从式15的化合物和式1或1A的化合物制备式14的方法。