(S)-benzyl 5-(dihydroxymethyl)-2,2-dimethyloxazolidine-3-carboxylate 、
2-tert-butyl-2-methyl-1,3-dioxan-5-one 在
D-脯氨酸 、
lithium chloride 作用下,
以
二甲基亚砜 为溶剂,
以58%的产率得到benzyl (5S)-5-[(S)-[(2R,4R)-2-tert-butyl-2-methyl-5-oxo-1,3-dioxan-4-yl]-hydroxymethyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate