(2R,4S)-3-<(Benzyloxy)carbonyl>-4-methyl-2-phenyl-1,3-oxazolidin-5-one 、 alkaline earth salt of/the/ methylsulfuric acid 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
以63%的产率得到(2R,4S)-3-<(Benzyloxy)carbonyl>-4-(<(tert-butyloxy)carbonyl>enthyl)-4-methyl-2-phenyl-1,3-oxazolidin-5-one