(3S)-(8S)-(8aR)-8a-(2-[1,3]dioxolan-2-yl-ethyl)-5-oxo-3-phenyl-hexahydro-oxazolo[3,2-a]pyridine-8-carboxylic acid methyl ester 在
dimethyl sulfide borane 作用下,
以
四氢呋喃 为溶剂,
反应 24.0h,
以91%的产率得到(1S)-(2S)-(3S)-2-(2-[1,3]dioxolan-2-yl-ethyl)-1-(2-hydroxy-1-phenyl-ethyl)-piperidine-3-carboxylic acid methyl ester