LBF20306CV01

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Upper classes: LB LBF



Preclavulone lactone I
LBF20306CV01.png
Structural Information
Systematic Name 4R- {cis-3- [ (1R,2S) -2- (cis-2-Octenyl) -5-oxo-3-cyclopentenyl] -1-propenyl} -4-butanolide
Common Name
  • Preclavulone lactone I
  • 4R- {3Z- [ (1R,2S) -2- (2Z-Octenyl) -5-oxo-3-cyclopentenyl] -1-propenyl} -4-butanolide
Symbol
Formula C20H28O3
Exact Mass 316.203844762
Average Mass 316.43452
SMILES C(CC=CC[C@@H]([C@@H]1CC=C[C@@H](C2)OC(=O)C2)C=CC(=O)1)CCC
Physicochemical Information
Melting Point
Boiling Point
Density
Optical Rotation [ α ]D -168.0° IwashimaMet al.
Refractive Index
Solubility
Source Preclavulone lactones were isolated from Japanese soft coral, Stolonifer Clavularia viridis Quoy and Gaimard. Iwashima_M et al.
Chemical Synthesis Preclavulone lactone I was synthesized from (S)-(-)-malic acid. Iwashima_M et al.
Metabolism Preclavulone lactone may possibly be biosynthesized from preclavulon A. Clavulones may be biosynthesized from preclavulone lactones via clavulolactones by oxygenation at C-12, dehydration between C-7 and C-8, and esterification at C-1 and C-4. Iwashima_M et al.
Biological Activity
Genetic Information
Note
Spectral Information
Mass Spectra HRFABMS m/z 316.2028 for C20}H_{28O3 (M+), calcd 316.2038. IwashimaMet al.
UV Spectra λ CH3CN&max 215 nm( ε 5740) IwashimaMet al.
IR Spectra ν 1775 and 1706cm-1 IwashimaMet al.
NMR Spectra 1H-NMR(500MHz,CDCl3) δ ppm0.89(3H,t,J=7.5Hz),1.2-1.4(6H,m),1.92(1H,dtd,8.4,9.7,12.9Hz),2.01(2H,brq,J=7.3Hz),2.11(1H,dt,J=2.3,5.9),2.27(1H,brtd,J=7.0,14.5Hz),2.32(1H,brtd,J=7.1,14.5Hz),2.41(1H,qd,J=6.6,12.9Hz),2.52(2H,m),2.57(2H,dd,J=6.6,9.7Hz),2.72(1H,qt,J=2.3,7.0Hz),5.27(1H,dt,J=6.6,8.4Hz),5.36(1H,brtd,J=7.1,10.8Hz),5.53(1H,dd,J=8.4,11.1Hz),5.54(1H,m),5.56(1H,td,J=7.2,11.1Hz),6.16(1H,dd,J=2.3,5.1Hz),7.60(1H,dd,J=2.3,5.8Hz). IwashimaMet al. 13C-NMR(125MHz,CDCl3) δ ppm14.0,22.5,27.3,27.5,28.9,29.1,29.2,31.3,31.5,46.3,50.3,76.0,125.2,129.9,130.9,133.1,133.4,167.2,177.0,210.6 IwashimaMet al.
Other Spectra
Chromatograms
Reported Metabolites, References
Biospecies ID Compound Name Reference Comment
n.a. LBF20306CV01 See above. Iwashima_M et al. 1997


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