Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Takeda Pharmaceutical Co Ltd
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Takeda Chemical Industries Ltd
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Priority claimed from JP741521Aexternal-prioritypatent/JPS57873B2/ja
Priority claimed from JP49020752Aexternal-prioritypatent/JPS50111093A/ja
Priority claimed from JP4257474Aexternal-prioritypatent/JPS57874B2/ja
Priority claimed from JP8262374Aexternal-prioritypatent/JPS5652908B2/ja
Application filed by Takeda Chemical Industries LtdfiledCriticalTakeda Chemical Industries Ltd
Publication of ES433302A1publicationCriticalpatent/ES433302A1/en
A procedure to obtain cephalosporin derivatives of the formula: **(See formula)** X represents oxygen or sulfur or a group of the formula -NR2 where R2 is hydrogen or an alcoholic group and, in the case of being an alcoholic group, can form a ring with and Y represents the acetoxy group or a group of the formula -SR3 (where R3 is a nitrogen containing heterocyclic group), or a pharmaceutically acceptable salt thereof, which comprises subjecting a compound of the formula: **(See formula)** wherein each of the symbols has the same meaning as described above, or a salt or ester thereof, to a ring closure reaction with removal of water. (Machine-translation by Google Translate, not legally binding)
ES74433302A1973-12-251974-12-24A procedure to obtain cefalosporine derivatives. (Machine-translation by Google Translate, not legally binding)
ExpiredES433302A1
(en)
A procedure for the preparation of new derivatives of 2-alkyl (bottom) -2 or 3-cefem-4-carboxylic acid. (Machine-translation by Google Translate, not legally binding)
A procedure for the preparation of new derivatives of 2-alkyl (bottom) -2 or 3-cefem-4-carboxylic acid. (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of 7-chlorine-1,2-dihydro-5-phenyl - 1,4-benzodiazepin-2-onas. (Machine-translation by Google Translate, not legally binding)