According to the present invention, there is provided a process for the preparation of a 3-amino-2-hydroxy-4-phenylbutyronitrile derivative represented by the formula (3), which comprises reacting an aminoaldehyde derivative represented by the formula (1) with a cyanohydrin derivative represented by the formula (2) in the presence of a metallic compound, base or acid;
wherein R1 and R2 each independently represents a hydrogen atom or a protective group for an amino group, R3 and R4 each represents an alkyl or cycloalkyl group or R3 and R4 may be coupled together to form a tetramethylene or pentamethylene group.
根据本发明,提供了一种制备式(3)代表的 3-
氨基-2-羟基-
4-苯基丁腈衍
生物 的工艺,该工艺包括在
金属化合物、碱或酸存在下,使式(1)代表的
氨基醛衍
生物 与式(2)代表的
氰醇衍
生物反应;
其中 R1 和 R2 各自独立地代表一个氢原子或一个
氨基的保护基团,R3 和 R4 各自代表一个烷基或环烷基,或 R3 和 R4 可连接在一起形成一个四亚甲基或五亚甲基。