摘要:
Desacetyl 7-aminocephalosporanic acid is obtained chemically in reasonable yield from desacetyl 7-aminocephalosporanic acid lactone by subjecting the lactone in a basic water-containing medium to a pH of 11-13 for 5 seconds to 5 minutes.
摘要:
A NUMBER OF NOVEL 3-FUNCTIONALIZEDMETHYL CEPHALOSPORIN SULFOXIDES WHICH ARE USEFUL INTERMEDIATES IN THE PREPARATION OF CEPHALOSPORIN ANTIBIOTICS ARE DISCLOSED AND CLAIMED. THESE NOVEL SULFOXIDES ARE OBTAINED BY THE OXIDATION OF THE CORRESPONDING CEPHALOSPORIN COMPOUNDS.
摘要:
The cephalosporin compound of formula (I) is disclosed, which exhibits antibiotic activity against Gram-negative (e.g., Pseudomonas aeruginosa) and Gram-positive (e.g., methicillin-resistant Staphylococcus aureus) bacteria. Methods of manufacturing the compound of formula (I), and uses of the compound in the preparation of pharmaceutical compositions and antibacterial applications are also disclosed.
摘要:
Provided herein is a method for the synthesis of cephalosporin antibiotic compounds comprising the conversion of a protected 7-amino group into a 7-carboxamide moiety in a single step.
摘要:
The present invention relates to a process for the production of cephalosporin antibiotic intermediate of formula (I). More particularly relates to the preparation of the compound of formula (I) using a solvent medium selected from the group consisting of decalin (decahydronapthalene), hexane, cyclohexene, tetralin, petroleum ether, wherein X represents HI, HCI, H2SO4 and the like. The compound of formula (I) is an important intermediate in the preparation of Cefepime.
摘要翻译:本发明涉及制备式(I)的头孢菌素抗生素中间体的方法。 更具体地涉及使用选自十氢萘(十氢萘),己烷,环己烯,四氢化萘,石油醚,其中X代表HI,HCl,H 2 SO 4等的溶剂介质制备式(I)化合物。 式(I)化合物是头孢吡肟制剂中的重要中间体。
摘要:
The present invention provides an improved process for the preparation of Cefixime of formula (I), a cephalosporine antibiotic with an improved quality in regard to color and solubility.
摘要:
The present invention relates to an improved process for the preparation of Cefditoren of formula (I), the said process comprising the steps of: i) converting the compound of formula (II) to a compound of the formula (III) using TPP and sodium iodide in the presence of THF, water, and base; ii) reacting the compound of formula (III) with 4-methyl-5-formyl-thiazole to produce a compound of formula (IV); iii) deesterifying the compound of the formula (IV) to yield compound of formula (V); iv) converting the compound of formula (V) to compound of formula (VI) in the presence of a base and solvent; v) converting the compound of formula (VI) into compound of formula (VII) by enzymatic hydrolysis; and vi) reacting compound of formula (VII) with compound of formula (VIII) in the presence of solvent and base to produce compound of formula (I).