Valine and alanine were converted into the corresponding α-hydroxy-β-amino acids through intramolecular S N 2' cyclization. The novel cyclization protocol relied upon the use of N-benzyl-protected carbamates derived from α-amino acids.
缬
氨酸和丙
氨酸通过分子内SN 2' 环化转化为相应的α-羟基-β-
氨基酸。新的环化方案依赖于使用衍生自
α-氨基酸的 N-苄基保护的
氨基甲酸酯。