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Sporolides A and B are polycyclic macrolides extracted from the obligate marine bacterium Salinispora tropica, which is found in ocean sediment. They are composed of a chlorinated cyclopenta[a]indene ring and a cyclohexenone moiety. They were the second group of compounds (after salinosporamide A) isolated from Salinispora, and were said to indicate the potential of marine actinomycetes as a source of novel secondary metabolites. The structures and absolute stereochemistries of both metabolites were elucidated using a combination of NMR spectroscopy and X-ray crystallography.

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  • Sporolides (en)
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  • Sporolides A and B are polycyclic macrolides extracted from the obligate marine bacterium Salinispora tropica, which is found in ocean sediment. They are composed of a chlorinated cyclopenta[a]indene ring and a cyclohexenone moiety. They were the second group of compounds (after salinosporamide A) isolated from Salinispora, and were said to indicate the potential of marine actinomycetes as a source of novel secondary metabolites. The structures and absolute stereochemistries of both metabolites were elucidated using a combination of NMR spectroscopy and X-ray crystallography. (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Biosynthesis.jpg
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Sporolides_A_and_B.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Synthesis.jpg
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  • Sporolides A and B.jpg (en)
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  • Sporolides A and B are polycyclic macrolides extracted from the obligate marine bacterium Salinispora tropica, which is found in ocean sediment. They are composed of a chlorinated cyclopenta[a]indene ring and a cyclohexenone moiety. They were the second group of compounds (after salinosporamide A) isolated from Salinispora, and were said to indicate the potential of marine actinomycetes as a source of novel secondary metabolites. The structures and absolute stereochemistries of both metabolites were elucidated using a combination of NMR spectroscopy and X-ray crystallography. The complex aromatic structure of the sporolides was hypothesized to be derived from an unstable nine-membered ring enediyne precursor, which could undergo Bergman cyclization to generate a para-benzyne intermediate. Nucleophilic attack by chloride would account for the 1:1 mixture of sporolide A and B and for the single chlorine in these enediyne-derived natural products. This proposed mechanism was demonstrated in laboratory experiments, (en)
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  • (3S,7S,8R,12R,17R,19R,21R,25R)-23-chloro-3,12,17,19,21-pentahydroxy-8-methoxy-5-methyl-2,10,24,26-tetraoxaheptacyclo[11.8.2.27,7.14,18.01,18.016,22.03,25]hexacosa-4,13(23),14,16(22)-tetraene-6,9-dione (en)
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