7-Acylamino-desacetoxy-cephalosporanic acid esters are produced by heating a sulfoxide of 6-acylaminopenicillanic acid ester at a temperature of from about 60.degree.C to about 150.degree.C in the presence of a phenol catalyst. The 7-acylamino-desacetoxy-cephalosporanic acid esters produced are known per se and are useful as intermediates for the preparation of desacetoxy-cephalosporin derivatives which exhibit antibacterial activity.
7-酰胺基去乙酰氧头孢烷酸酯通过在
苯酚催化剂的存在下,在约60°C至约150°C的温度下加热6-酰胺基青霉烷酸酯的亚砜,制备而成。制得的7-酰胺基去乙酰氧头孢烷酸酯本身已知,并且可用作制备表现出抗菌活性的去乙酰
氧头孢菌素衍
生物的中间体。