A process for the preparation of a compound of formula (I), or a salt thereof, both as the as individual isomer and as mixtures thereof,
wherein each of A and B is independently aryl or heteroaryl optionally substituted with 1 to 4 substituents; and R and R1, which can be the same or different, are hydrogen, C1-C6 alkyl or an amino-protecting group; comprising the reaction of a compound (II)
wherein A and B are as defined above, with a compound (III)
wherein each of R and R1 is independently C1-C6 alkyl or an amino-protecting group; and X is a leaving group; in the presence of a basic agent; and, if desired the conversion of a compound (I) to another compound (I); and/or, if desired, the separation of an isomeric mixture of a compound (I) into the individual isomers; and/or, if desired, the conversion of a compound (I) to a salt thereof.
一种制备式(I)化合物或其盐的工艺,包括单个异构体和混合物、
其中 A 和 B 各自独立地为被 1 至 4 个取代基任选取代的芳基或杂芳基;以及 R 和 R1(可以相同或不同)为氢、C1-C6 烷基或
氨基保护基团;包括化合物 (II) 的反应
其中 A 和 B 如上定义,与化合物 (III) 反应
其中 R 和 R1 分别独立地为 C1-C6 烷基或
氨基保护基;X 为离去基团;在碱性剂存在下;如果需要,将化合物 (I) 转化为另一种化合物 (I);和/或,如果需要,将化合物 (I) 的异构混合物分离为单个异构体;和/或,如果需要,将化合物 (I) 转化为其盐。