摘要:
The invention relates to a process for the preparation of β-lactam derivatives having a substituted hydroxymethyl group at the carbon atom a to the lactam carbonyl group, to the novel antibacterially-active derivatives so-obtainable and to pharmaceutical compositions containing these. The process comprises reacting under specified conditions an α-halo-β-lactam starting material with activated zinc in the presence of an appropriate aldehyde or ketone and hydrolysing the resulting zinc complex. The novel β-lactam derivatives are of the general formula I (with the meaning of R, R 1 -R 4 , Y and Z as given in the specification) and include the pharmaceutically acceptable salts thereof.