Journal
CHEMMEDCHEM
Volume 17, Issue 23, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cmdc.202200363
Keywords
antimicrobial agents; natural products; V; harveyi; asymmetric synthesis; lactones
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Funding
- National Science Foundation [CHE2003692, DGE1937971]
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Synthetic investigations of natural products have played an important role in developing novel antibacterial small molecules. The total synthesis of 1-hydroxyboivinianin A and its enantiomer with a six-step sequence yielded 42% overall. Both enantiomers showed negligible antibacterial activity against a panel of gram-positive and negative bacteria, as well as minimal antifungal activity against phytopathogens.
Synthetic investigations of natural products has been instrumental in the development of novel antibacterial small molecules. 1-hydroxyboivinianin A, a lactone containing phenolic bisabolane isolated from marine sediment, has reported antibacterial activity against the aquatic pathogen Vibrio harveyi. The total synthesis of 1-hydroxyboivinianin A and its enantiomer was completed in a six-step sequence in 42 % overall yield. The synthesis leveraged a key diastereoselective nucleophilic addition with chiral imidazolidinone to establish the benzylic tertiary alcohol and intramolecular Horner-Wadsworth Emmons to furnish the lactone. Both enantiomers were found to have negligible antibacterial activity against a panel of gram-positive and negative bacteria and minimal antifungal activity against phytopathogens. Investigations of a possible in vitro lactone hydrolysis to produce an inactive linear acid led to the discovery of a spontaneous cyclization, suggesting the lactone is resistant to hydrolysis and the lactone is not degrading to produce an inactive species.
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