申请人:Eli Lilly and Company
公开号:US03962276A1
公开(公告)日:1976-06-08
5-Epi-penicillin esters and acids, the acids being useful as inhibitors of .beta.-lactamase type enzymes, a process for preparing such compounds by reacting an ester of a 2-halo-.alpha.-(1'-halothio-1'-methylethyl)-4-oxo-3-imido-1-azetidineaceta te with (a) zinc in acid or (b) stannous chloride in an organic liquid medium at 0.degree. to 100.degree.C., and some new 2-halo-.alpha.-(1'-cyanodithia- or 1'-mercapto-1'-methylethyl)-4-oxo-3-imido-2-azetidineacetate which are useful as intermediates in preparing the 5-epi-penicillins.
5-Epi-青霉素酯和酸,其中酸可用作β-内酰胺酶类酶的抑制剂,通过将2-卤代-α-(1'-卤代硫代甲基乙基)-4-氧代-3-亚胺-1-氮杂环乙酸酯的酯与(a)酸中的锌或(b)有机液体介质中的氯化亚锡在0℃至100℃反应制备此类化合物的过程,以及一些新的2-卤代-α-(1'-氰代二硫代或1'-硫代-1'-甲基乙基)-4-氧代-3-亚胺-2-氮杂环乙酸酯,它们可用作制备5-Epi-青霉素的中间体。