6-Acylaminopenicillanoyloxymethyl esters and 1-(6-acylaminopenicillanoyloxy)ethyl esters of 2-beta-acetoxymethyl-2-alpha-methyl-(5R)penam-3-alpha-carboxylic acid 1,1-dioxide are useful as antibacterial agents. The 6-aminopenicillanoyloxymethyl ester, the 1-(6-aminopenicillanoyloxy)ethyl ester and certain other mono-substituted methyl and ethyl esters of 2-beta-acetoxymethyl-2-alpha-methyl-(5R)penam-3-alpha-carboxylic acid 1,1-dioxide are useful intermediates to the aforesaid antibacterial agents.
6-酰基
氨基青霉烷酰氧甲基酯和1-(6-酰基
氨基青霉烷酰氧基)乙基酯的2-β-乙酰氧甲基-2-α-甲基-(5R)青霉烷-3-α-
羧酸1,1-二氧化物作为抗菌剂有用。6-
氨基青霉烷酰氧甲基酯,1-(6-
氨基青霉烷酰氧基)乙基酯和2-β-乙酰氧甲基-2-α-甲基-(5R)青霉烷-3-α-
羧酸1,1-二氧化物的某些其他单取代甲基和乙基酯是前述抗菌剂的有用中间体。