(S)-2-Amino-3-phenyl-propionic acid 3-(2,2-dimethyl-propionyloxy)-1-isopropyl-2-oxo-propyl ester 在
sodium acetate 、 magnesium sulfate 作用下,
以
乙腈 为溶剂,
反应 0.67h,
生成 2,2-Dimethyl-propionic acid (2S,5S)-5-benzyl-2-isopropyl-6-oxo-5,6-dihydro-2H-[1,4]oxazin-3-ylmethyl ester 、 2,2-Dimethyl-propionic acid (2R,5S)-5-benzyl-2-isopropyl-6-oxo-5,6-dihydro-2H-[1,4]oxazin-3-ylmethyl ester