tert-butyl trans-(5-hydroxy-2-oxopiperidin-3-yl)carbamate 、
咪唑 、
叔丁基二甲基氯硅烷 在
silica gel 、
ethyl acetate n-hexane 、
[5-(tert-butyldimethylsilanyloxy)-2-oxopiperidin-3-yl]carbamic acid tert-butyl ester 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 14.0h,
以to give a diastereomeric mixture (cis:trans=3:1) of [5-(tert-butyldimethylsilanyloxy)-2-oxopiperidin-3-yl]carbamic acid tert-butyl ester [Compound 2] as a colorless solid (1.034 g, 95%)的产率得到[5-(tert-butyldimethylsilanyloxy)-2-oxopiperidin-3-yl]carbamic acid tert-butyl ester