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1989 (1)
1985 (1)
1983 (1)
1Author    JohnL. InghamRequires cookie*
 Title    Isolation and Identification of Isoflavanone Phytoalexins from Leaflets of Diphysa robinioides  
 Abstract    Phytochem ical Unit, D e p artm en t o f Botany, U niversity o f R e ad in g , R e ad in g R G 6 2A S, E ngland and Satoshi Tahara D epartm ent o f A gricultural C hem istry, F acu lty o f A griculture, H o k k aid o U niversity, A m ajor phytoalexin produced by th e fu ngus-inoculated leaflets o f D iphysa robinioides has been identified as the new isoflavonoid 5 ,7 ,2 ',4 '-te tra h y d ro x y -6 -(3 ,3 -d im eth y la lly l)iso flav a n o n e (diphysolone). It is accom panied by sm aller q u a n titie s o f d ip h y so lo n e -4 ' (or 2 ')-0 -m e th y l ether (diphysolidone), and the known isoflavonoids 5,7,2',4 '-tetrah y d ro x y -8 -(3 ,3 -d im eth y lally l)iso -flavanone (kievitone) and 5 ,7 ,2 '-trihydroxy-4'-m ethoxyisoflavanone (ferreirin). 
  Reference    Z. Naturforsch. 38c, 899—904 (1983); received July 8 1983 
  Published    1983 
  Keywords    Legum inosae, P apilionoideae, Diphysa, Isoflavonoids, Isoflavanones 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0899.pdf 
 Identifier    ZNC-1983-38c-0899 
 Volume    38 
2Author    JohnL. Ingham, Satoshi TaharaRequires cookie*
 Title    Isoneorautenol and Other Pterocarpan Phytoalexins from Calopogonium mucunoides  
 Abstract    Following inoculation with the fungus H elm inthosporium carbonum , excised leaflets o f the tropical papilionate legum e C alopogonium m ucunoides have been found to produce isoneorautenol, a new dim ethylpyrano-substituted isoflavonoid (pterocarpan) phytoalexin. This com pound accumulates together with dem ethylm edicarpin, neodu nol, tuberosin, sophorap-terocarpan A , and a sixth highly antifungal isoflavonoid (calopocarpin) characterised as 3,9-dihydroxy-2-(3,3-dim ethylallyl)pterocarpan. Chrom atographic and spectroscopic exam ination of 'hom oedudiol' (a pterocarpan from N eorautanenia edulis roots previously considered to possess the structure now assigned to calopocarpin) has shown that in reality this substance is identical with sophorapterocarpan A . The system atic relationship o f C alopogonium to other genera within the legum e tribe P haseoleae is briefly discussed. 
  Reference    Z. Naturforsch. 40c, 482—489 (1985); received March 16 1985 
  Published    1985 
  Keywords    Legum inosae, Calopogonium, Isoflavonoids, ( —) —Pterocarpans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0482.pdf 
 Identifier    ZNC-1985-40c-0482 
 Volume    40 
3Author    JohnL. Ingham, SatoshiT. Ahara, Seiji Shibaki, Junya MizutaniRequires cookie*
 Title    Isoflavonoids from the Root Bark of Piscidia erythrina and a Note on the Structure of Piscidone  
 Abstract    A m ethanolic extract of P iscidia erythrina root bark has been found to contain various isofla-vonoids including rotenone (rotenoid), lisetin (coum aronochrom one) and six known isoflavones (ichthynone, piscidone, piscerythrone, 2'-deoxypiscerythrone, 6'-prenylpiscerythrone and 3',5'-diprenylgenistein). The extract additionally yielded three new 5-hydroxyisoflavones (piscery-thrinetin, 2'-hydroxypiscerythrinetin and isow ighteone) and a previously unreported coum arono­ chrom one (8-prenyl-lisetin). A ll four com pounds were identified using a com bination o f spectro­ scopic (U V , M S, 'H NM R) and chemical m ethods. Although several other 5-hydroxyisoflavones were also isolated from the root bark extract, the quantities o f each were sufficient only to permit their partial characterization. Structure 2 for piscidone has been confirmed by 'H N M R spectros­ copy. 
  Reference    Z. Naturforsch. 44c, 905 (1989); received June 13 1989 
  Published    1989 
  Keywords    Legum inosae, Piscidia, Isoflavonoids, Isoflavones, C oum aronochrom one, Piscidone 
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 TEI-XML for    default:Reihe_C/44/ZNC-1989-44c-0905.pdf 
 Identifier    ZNC-1989-44c-0905 
 Volume    44