Two efficient routes have been established for the preparation of both enantiomers of cis-(2-aminocyclobutyl)acetic acid, a conformationally restricted analogue of GABA. Both procedures converged on the racemic N-tert-butoxycarbonyl derivative of the target compound, which was resolved through chiral derivatization with an oxazolidinone auxiliary, which also allowed determination of the absolute configuration
已经建立了两种有效途径来制备顺式-(2-
氨基
环丁基)
乙酸(
GABA 的构象限制类似物)的两种对映异构体。两种方法都集中在目标化合物的外消旋 N-叔丁氧基羰基衍
生物上,该衍
生物通过手性衍生化与
恶唑烷酮助剂进行拆分,这也允许确定新化合物的绝对构型。第一条路线涉及顺式-2-
氨基
环丁烷羧酸的同系化,而第二条路线采用分子内光环化方案,该方案提供了对目标结构的内酰胺形式的便利的顺式选择性访问。