Dimethyl formiminium chloride chlorosulphate derivatives useful

Details Dimethyl formiminium chloride chlorosulphate derivatives useful Dimethyl formiminium chloride chlorosulphate derivatives useful

1996-03-26

1998-04-14

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548187, 548186, 548250, 548253, 548254, C07D277587, C07D25704

Patent

active

057393460

ABSTRACT:
This invention relates to reactive derivatives of 2-(2-aminothiazol-4-yl)-2-methoxyimino acetic acid and 1H-tetrazol-1-acetic acid of the following general formula I, ##STR1## wherein R.sub.3 = ##STR2## as well as to use thereof in the manufacture of cephalosporin antibiotics such as cefotaxime, ceftriaxone and cefazolin.

REFERENCES:
patent: 4152432 (1979-05-01), Heymes et al.
patent: 5037988 (1991-08-01), Meseguer et al.
patent: 5317099 (1994-05-01), Lee et al.

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