tetra-n-butylammonium 6-(2-benzyloxycarbonylamino-2-[4-hydroxyphenyl]acetamido)penicillanate 、
methylsulfonyloxymethyl 6,6-dibromopenicillanate 1,1-dioxide 以
2,4-二甲基-3-戊酮 为溶剂,
生成 1,1,-Dioxo-6,6-dibromopenicillanoyloxymethyl 6-[D-2-benzyloxycarbonylamino-2-(p-hydroxyphenyl)acetamido]penicillanate