7-hydroxy-2-methoxycarbonylmethyl-5-methyl-s-triazolo[1,5-a]pyrimidine 、 三氯氧磷 在
三氯氧磷 、 氯仿 、 ice water 、 silica gel 作用下,
反应 2.0h,
以affording 1 g of the objective compound的产率得到7-chloro-2-methoxycarbonylmethyl-5-methyl-s-triazolo[1,5-a]pyrimidine
The present invention relates to novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel cephalosporin derivatives as active components, and the intermediate compounds in the synthesis of cephalosporin derivatives and processes for producing thereof. The novel cephalosporin derivatives according to the present invention contain condensed heterocyclic groups, particularly a triazolopyrimidine ring or a thiadiazolopyrimidine ring as substituents at the 3-position of the cephem skeleton, and a hydroxyimino, an alkyloxyimino or an acyloxyimino moiety as substituents at the 7-position of the cephem skeleton. The compounds of the present invention containing the aforementioned substituents have a strong antibacterial activity against gram-negative bacteria and also against gram-positive bacteria including methicillin-resistant Staphylococcus aureus. These compounds are extremely useful for the treatment of infectious diseases.
Cephalosporin derivatives, processes for producing the same and compositions containing them
申请人:MOCHIDA PHARMACEUTICAL CO., LTD.
公开号:EP0150507A2
公开(公告)日:1985-08-07
Novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel cephalosporin derivatives as active components, and the intermediate compounds in synthesis of cephalosporin derivative and processes for producing thereof are disclosed.
The novel cephalosporin derivatives contain condensed heterocyclic groups, particularly a triazolopyrimidine ring or a thiadiazolopyrimidine ring as substituents at the 3-position of the cephem skeleton, and a hydroxyimino, an alkyloxyimino or an acyloxyimino moiety as substituents at the 7-position of the cephem skeleton.
These compounds have a strong antibacterial activity against gram-negative bacteria and also against gram-positive bacteria including methicillin-resistant Staphylococcus aureus. They are extremely useful for the treatment of infectious diseases.