benzhydryl (6R,7Z)-3-fluoro-5,5,8-trioxo-7-(pyridin-2-ylmethylidene)-5lambda6-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 在
苯甲醚 、
三氟乙酸 作用下,
生成 (R)-3-Fluoro-5,5,8-trioxo-7-[1-pyridin-2-yl-meth-(Z)-ylidene]-5λ
6-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid