申请人:Pfizer Inc.
公开号:US04375434A1
公开(公告)日:1983-03-01
6'-Aminopenicillanoyloxymethyl penicillanate 1,1-dioxide is prepared by a two-step procedure. The first step consists of coupling a salt of a 6-(protected amino)penicillanic acid with a halomethyl, an alkylsulfonyloxymethyl or an arylsulfonyloxymethyl ester of penicillanic acid 1,1-dioxide, to give a 6'-(protected amino)penicillanoyloxymethyl penicillanate 1,1-dioxide, wherein the protection at the 6-position has been achieved by coupling the 6-aminopenicillanic acid with a beta-dicarbonyl compound. The second step consists of removal of the protecting group on the 6'-amino group, using aqueous acid. 6'-Aminopenicillanoyloxymethyl penicillanate 1,1-dioxide is a chemical intermediate for preparing antibacterial agents. Also claimed are the 6'-(protected amino)penicillanoyloxymethyl penicillanate 1,1-dioxide compounds used as intermediates in the process of this invention.
6'-氨基青霉素酰氧甲基青霉素酯1,1-二氧化物是通过两步法制备的。第一步包括将6-(保护氨基)青霉素酸的盐与青霉素酸1,1-二氧化物的卤甲基、烷基磺酰氧甲基或芳基磺酰氧甲基酯偶联,得到6'-(保护氨基)青霉素酰氧甲基青霉素酯1,1-二氧化物,其中6-位置的保护是通过将6-氨基青霉素酸与β-二羰基化合物偶联实现的。第二步包括使用水溶酸去除6'-氨基基团的保护基。6'-氨基青霉素酰氧甲基青霉素酯1,1-二氧化物是制备抗菌药物的化学中间体。还声明了作为本发明过程中间体使用的6'-(保护氨基)青霉素酰氧甲基青霉素酯1,1-二氧化物化合物。