6-O-benzyl 7-O-tert-butyl (1R,3R,5R,7S)-3-benzoyl-8-oxo-6-azabicyclo[3.2.1]octane-6,7-dicarboxylate 以
二氯甲烷 为溶剂,
以67%的产率得到(1R,3R,4R,5R,7R)-4-Hydroxy-8-oxo-4-phenyl-2-aza-tricyclo[3.3.1.0
3,7]nonane-2,3-dicarboxylic acid 2-benzyl ester 3-tert-butyl ester