The first total and unequivocal syntheses of (R)- and (S)-norneoenactin A (1), an analog of the antifungal antibiotic neoenactin A, are described. The key step of each synthesis was the Michael addition of a serinehydroxamate (5 or 8) to the appropriate vinyl ketone 4. Biological activity of the two enantiomers of norneoenactin A ((S)-1 and (R)-1) against Escherichia coli and several fungi has been investigated.
The first total and unequivocal syntheses of (R)- and (S)-norneoenactin A (1), an analog of the antifungal antibiotic neoenactin A, are described. The key step of each synthesis was the Michael addition of a serinehydroxamate (5 or 8) to the appropriate vinyl ketone 4. Biological activity of the two enantiomers of norneoenactin A ((S)-1 and (R)-1) against Escherichia coli and several fungi has been investigated.
The first total and unequivocal syntheses of (R)- and (S)-norneoenactin A (1), an analog of the antifungal antibiotic neoenactin A, are described. The key step of each synthesis was the Michael addition of a serinehydroxamate (5 or 8) to the appropriate vinyl ketone 4. Biological activity of the two enantiomers of norneoenactin A ((S)-1 and (R)-1) against Escherichia coli and several fungi has been investigated.