申请人:Sankyo Company, Limited
公开号:US05451675A1
公开(公告)日:1995-09-19
A compound of formula (I): ##STR1## or a salt thereof, is prepared by reacting 7-aminocephalosporanic acid or a salt thereof, with a solution comprising a compound of formula ROSO.sub.3 H in a compound of formula ROH, and in the presence of at least one compound of formula B(OR).sub.3 or compound of formula CH.sub.2 (OR).sub.2 ; wherein, in each of said compounds of formulae (I), ROSO.sub.3 H, ROH, B(OR).sub.3 and CH.sub.2 (OR).sub.2, R represents an alkyl group having from 1 to 6 carbon atoms.
公式(I)的化合物:##STR1##或其盐,通过将7-氨基头孢菌素酸或其盐与含有公式ROSO.sub.3 H的化合物和公式ROH的溶液反应,并在至少一种公式B(OR).sub.3或公式CH.sub.2(OR).sub.2的化合物的存在下制备;其中,在上述每个公式(I)、ROSO.sub.3 H、ROH、B(OR).sub.3和CH.sub.2(OR).sub.2中,R代表具有1至6个碳原子的烷基基团。