(1R,4S,5R,6R,7R,8S)-5,6,7-Trihydroxy-8-methoxy-2,3-diaza-bicyclo[2.2.2]octane-2,3-dicarboxylic acid dimethyl ester 在
氢氧化钾 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
生成
(1R,6S,7R,8S,9R,10S)-8,10-Dihydroxy-9-methoxy-4-oxo-5-oxa-2,3-diaza-tricyclo[4.3.1.03,7]decane-2-carboxylic acid methyl ester