methyl (2R,4S)-3-(4-tert-butoxy-2-methyl-3-oxobutanoyl)-2-(tert-butyl)oxazolidine-4-carboxylate 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 24.0h,
以17%的产率得到(2R,5R,6R,7S)-1-aza-2-(tert-butyl)-6-hydroxy-7-methyl-6-(tert-butoxymethyl)-5-methoxycarbonyl-3-oxa-8-oxobicyclo[3.3.0]octane