| abstract |
A process for the preparation of new cephalosporin compounds of the formula: **(Formula)** where R1 is hydrogen or hydroxy; R2 is a substituted alkanoyl group, where the substituent on the alkanoyl group is thienyl; phthalimido; hydroxy- or oxo-pyrido{1,2-a} primidinyl; a 5-membered heterocyclic group containing 2 or 3 heteroatoms selected from nitrogen, oxygen and sulfur, containing one or two substituents selected from hydroxy, oxo, alkyl, phenyl, halophenyl, amino, N'', N''-dialkylaminoalkylidenamino, imino , mercapto, thioxo and alkylthio. |