γ-Lactamanalogues of carbapenems have been synthesized using a [3+2] cyclization approach. Slight antibiotic activity was observed in one case.
碳青霉烯的γ-内酰胺类似物已使用[3 + 2]环化方法合成。在一个病例中观察到了轻微的抗生素活性。
1-Carbacephalosporin antibiotics
申请人:ELI LILLY AND COMPANY
公开号:EP0232623A1
公开(公告)日:1987-08-19
7β-Acylamino-3-alkoxycarbonyl-(and 3-keto)-1-carba (1-dethia)-3-cephem-4-carboxylic acids and derivatives and related 3-substituted compounds are provided as antibiotics useful for treating infections in man and other animals. Pharmaceutical formulations comprising the antibiotics, intermediates, and a process for their preparation are also provided.
A method for preparing 2-amino-β-lactams which are substituted by readily-removed protecting groups is provided. According to this invention, an acyl-2-amino-β-lactam is further acylated with a different acyl group and is subsequently treated with base to provide a protected 2-amino β-lactam with a more desirable protecting group.