New resolution method of α-methyl-α-amino acid has been accomplished by way of l-menthyl ester i.e. (-)-IIa, (-)-IIb, (+) and (-)-IIc-HCl, (-)-VII and (-)-VIII were obtained in pure state from DL-IIa, IIb, and IIc by way of the scheme shown in Chart 1 and 2.
新的α-甲基-
α-氨基酸的解析方法是通过 l-薄荷酯来实现的,即通过图 1 和图 2 所示的方案,从 DL-IIa、IIb 和 IIc 中获得纯态的 (-)-IIa、(-)-IIb、(+) 和 (-)-IIc-HCl 、(-)-VII 和 (-)-VIII 。