摘要:
A β-lactam compound and a 2-(substituted methyl)-3-cephem compound, both being useful as an intermediate for the synthesis of cephem antibiotics and so forth. The lactam compound is represented by general formula (I), wherein R¹ represents protected amino, etc.; R² represents hydrogen, etc.; R³ represents hydrogen or a protective group for a carboxyl group; R⁴ represents optionally substituted aryl; and R⁵ represents optionally substituted alkenyl, etc. The cephem compound is represented by general formula (II), wherein R¹, R² and R³ are each as defined above; and R⁶ represents optionally substituted aryl.
摘要翻译:β-内酰胺化合物和2-(取代的甲基)-3-头孢烯化合物都可用作合成头孢烯抗生素等的中间体。 内酰胺化合物由通式(I)表示,其中R 1表示被保护的氨基等; R 2表示氢等; R 3表示氢或羧基的保护基; R 4表示任选取代的芳基; 并且R 5表示任选取代的烯基等。头孢烯化合物由通式(II)表示,其中R 1,R 2和R 3各自如上所定义; 且R 6表示任选取代的芳基。
摘要:
The invention relates to novel 4-oxo-azetidine-2-sulfonic acids and their salts or the formula I
wherein: R¹ = hydrogen, halogen, phenylacetamido; R² = hydrogen, halogen, phenylacetamido, phenoxyacetamido, phthalimido, 5-methyl-3- o -chlorophenyl-isoxazole-4-carboxamido; R³ = hydrogen, alkali metal, alkaline earth metal, quaternary ammonium group; R⁴ = hydrogen, SO₂O ⁻⁺ NBu₄- n , (CH₃)₂C=C-COOCH₃, (CH₃)₂C=C-COOCH₂Ph, (CH₃)₂C=C-COOCH₂-C₆H₄-NO₂- p , (CH₃)₂C=C-COOCH₂-C₆H₄-CH₃- m . The products (I) may be used as intermediates in the synthesis of beta-lactamic antibiotics or as components in antimicrobial preparations.
摘要:
The present invention provides an allenyl β -lactam compound represented by the formula (1)
wherein R¹ is a hydrogen atom, halogen atom, amino or protected amino, R² is a hydrogen atom, halogen atom, lower alkoxyl, lower acyl, lower alkyl, lower alkyl substituted with hydroxyl or protected hydroxyl, hydroxyl or protected hydroxyl, R¹ and R² representing =O when taken together, R³ is a hydrogen atom or carboxylic acid protecting group, and X is the group -SO₂R⁴ or the group -SR⁴, R⁴ being substituted or unsubstituted aryl or substituted or unsubstituted nitrogen-containing aromatic heterocyclic group.