acetic acid 1-(2-benzylcarbamoyl-3-oxiranyl-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-en-6-yl)ethyl ester 在
magnesium(II) perchlorate 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
以53%的产率得到Acetic acid (R)-1-((1S,7aS)-4-benzyl-6-hydroxy-2,3-dioxo-1,3,4,5,6,7a-hexahydro-2H-7-thia-2a,4-diaza-cyclobuta[a]inden-1-yl)-ethyl ester