Synthesis and biological activity of flavipucine analogues

A series of analogues of flavipucine was prepared possessing side chain as well as nuclear variants. The analogue with an octyl side chain (5d) was found to exhibit enhanced activity against several bacteria and fungi as compared with the natural product itself. The separation and characterization of the individual diastereoisomeric pairs both spectroscopically and with respect to chromatographic mobility have been effected.