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Stereochemistry of diastereomeric neolignans from Piper hookeri by nuclear magnetic resonance spectroscopy
Author(s) -
Pradhan Padmanava,
Banerji Asoke
Publication year - 1998
Publication title -
phytochemical analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 72
eISSN - 1099-1565
pISSN - 0958-0344
DOI - 10.1002/(sici)1099-1565(199803/04)9:2<71::aid-pca390>3.0.co;2-0
Subject(s) - diastereomer , chemistry , stereochemistry , nuclear magnetic resonance spectroscopy , absolute configuration
A new 8.1′ type neolignan, (8 R ,1′ S or 8 S ,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 alchoholic 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. © 1998 John Wiley & Sons, Ltd.