摘要:
A compound of formula (I), wherein W, V, R1, R5, R2, R3 and R4 have various meanings, a process for their production and their use as a pharmaceutical.
摘要:
A process for the production of a crystalline salt, e.g. sodium, of amoxicillin, in ethanol as solvent, the use of ethanol as solvent in the crystallization of a salt, e.g. sodium, of amoxicillin and a crystalline salt of amoxicillin containing ethanol.
摘要:
A process for recovering 2,2-dimethylpropanoic acid in highly pure form from a mixture of 2,2-dimethylpropanoic acid and impurities which may be obtained in the production of a beta lactam antibiotic, by degrading impurities and separating off the volatile fragments.
摘要:
A process for the removal of fluoride from spent liquors obtained in a process in the production of an organic compound in which boron trifluoride is used by conversion of fluoride into an isolatable salt of tetrafluoroborate.
摘要:
A process for etherifying the hydroxymethyl group in position 3 of a cephalosporin by reaction of a 3-hydroxymethyl cephalosporin with an dioxycarbenium-tetrafluoroborate.
摘要:
7-Trimethylamino-3-jodomethylcephem(3)-4-carbonsäuretrimethylsilylester, dessen Verwendung als Zwischenprodukt zur Herstellung von Cephalosporinderivaten und ein Verfahren zur Herstellung von Cephalosporinderivaten unter Verwendung dieses Zwischenproduktes.
摘要:
The invention relates to a new process for the production of the disodium salt hemiheptahydrate of ceftriaxone by reacting 7-amino-3-{[(2,5-dihydro-6-hydroxy-2-methyl-5-oxo-1,2,4-triazin-3-yl)thio]methyl}-3-cephem-4-carboxylic acid with 2-(2-aminothiazol-4-yl)-2-syn-methoximinoacetic acid-(2-benzthiazolyl)thiolester in the presence of a base, characterized in that the reaction and the crystallization of the disodium salt hemiheptahydrate of ceftriaxone are carried out in aqueous acetone.
摘要:
A new process is described for the production of 7-alpha-aminoacylcephalosporin free from halogen-containing solvents by acylating 7-amino-ceph-3-em-4-carboxylic acid or a derivative thereof in a halogen-free solvent.