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Stereochemistry of diastereomeric neolignans from Piper hookeri by nuclear magnetic resonance spectroscopy

Stereochemistry of diastereomeric neolignans from Piper hookeri by nuclear magnetic resonance spectroscopy

Phytochemical Analysis 9(2): 71-74

A new 8.1' type neolignan, (8R,1'S or 8S,1'R)-4-(2-(1,3-benzodioxolo-5-yl)-1-methylethyl)-2,5-dimethoxy-1-propenyl-2,5-cyclohexadienone, hookerinone B a diastereomer of hookerinone A, and a pair of 8.3' type diastereomeric neolignans, lancifolin C and lancifolin D, were isolated from the alcoholic extracts of the medicinal plant Piper hookeri. The absolute configurations of these neolignans and of a third diastereomeric pair, dihydroisofutoquinol A and dihydroisofutoquinol B, were established by nuclear magnetic resonance spectroscopic methods.

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Accession: 009455820

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DOI: 10.1002/(sici)1099-1565(199803/04)9:2<71::aid-pca390>3.0.co;2-0

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