Intermediate compounds in the synthesis of Sitagliptin, 3-amino-4-(2,4,5-trifluorophenyl)but-2-enoic acid alkyl ester, and amino protected-3-amino-4-(2,4,5-trifluorophenyl)but-2-enoic acid alkyl ester, and the stereoselective reduction of these compound to give Synthon I, or the amino-protected Synthon I, are provided.
本文提供了在Sitagliptin合成中使用的中间化合物,包括3-
氨基-4-(2,4,5-三
氟苯基)丁-2-烯酸烷基酯和
氨基保护的3-
氨基-4-(2,4,5-三
氟苯基)丁-2-烯酸烷基酯,以及对这些化合物进行立体选择性还原以得到Synthon I或
氨基保护的Synthon I。