An Insecticidal Alkaloid, Cocculolidine from<i>Cocculus trilobus</i>DC.
TL;DRAbstract
An insecticidal alkaloid, cocculolidine was extracted from fresh leaves of Cocculus trilobus DC. Von Braun reaction and a novel acid catalyzed degradation showed that this alkaloid had the same skeleton with those of erythrina alkaloids. Structure (I) was finally assigned to cocculolidine, being identified as a new lactone erythrina alkaloid containing α, β-unsaturated-γ-lactone. The mass spectra of I and dihydro-β-erythroidine were also discussed.
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An insecticidal alkaloid, cocculolidine was extracted from fresh leaves of Cocculus trilobus DC. Von Braun reaction and a novel acid catalyzed degradation showed that this alkaloid had the same skeleton with those of erythrina alkaloids. Structure (I) was finally assigned to cocculolidine, being identified as a new lactone erythrina alkaloid containing α, β-unsaturated-γ-lactone. The mass spectra of I and dihydro-β-erythroidine were also discussed.
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