A process for the preparation of 1,1-dioxopenicillanoyloxymethyl 6-beta-aminopenicillanate which comprises reacting 1,1-dioxopenicillanoyloxymethyl 6-phenylacetamidopenicillante or the corresponding phenoxy- acetamidopenicillanate under anhydrous conditions with a halogenating agent in the presence of a reaction inert solvent to form an intermediate imino halide, addition of a primary alcohol having from one to four carbon atoms to convert the imino halide to an imino ether and subsequent hydrolysis to give the desired product.
1,1-dioxopenicillanoyloxymethyl 6-beta-aminopenicillanate 的制备工艺,包括 1,1-dioxopenicillanoyloxymethyl 6-phenylacetamidopenicillante 或相应的 phenoxy- acetamidopenicillanate 在无
水条件下,在反应惰性溶剂存在下与卤化剂反应,形成中间亚
氨基卤化物、加入具有一至四个碳原子的伯醇,将
亚胺卤化物转化为
亚胺醚,然后
水解得到所需的产品。