Synthesis and biological activity of δ-(L-α-aminoadipoyl)-L-cysteinyl-N-hydroxy-D-valine: a proposed intermediate in the biosynthesis of the penicillins
Abstract
δ-(L-α-Aminoadipoly)-L-cysteinyl-N-hydroxy-D-valine (3a) has been prepared from the appropriately protected amino acids; (3a) was not converted into isopenicillin N (2) using a cell-free from Cephalosporium acremonium but inhibited the formation of (2) from δ-(L-α-aminoadipoyl)-L-cysteinyl-D-valine (1) by this system.