- Studies on Chemical Conversion of Alpinenone to Furopelargone B
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The process of the chemical conversion of alpinenone into furopelargone B, both of wich had been isolated from the rhizomes of Alpinia japonica (Zingiberaceae), was studied by means of conformational analysis and consideration of the frontier electron densities of the reaction intermediates obtained by molecular mechanism calculation (MM2) and molecular orbital calculation (modification neglect of differential overlap (MNDO)) methods.
- Morita, Hiroshi,Simuzu, Katumasa,Takizawa, Harumi,Aiyama, Ritsuo,Itokawa, Hideji
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p. 3156 - 3160
(2007/10/02)
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- Novel Guaiane- and Secoguaiane- Type Sesquiterpenes from Alpinia japonica (THUNB.) MIQ.
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Three novel guaiane-type sesquiterpenes, hanalpinone (I), isohanalpinone (II), and alpinenone (III), and two novel secoguaiane-type sesquiterpenes, alpinolide peroxide (IV) and 6-hydroxyalpinolide (V) have been isolated from the rhizomes of Alpinia japonica.Their structures were determined by spectroscopic methods, chemical conversions, and X-ray analysis.Their biosynthetic relationships with previously identified sesquiterpenes from Alpinia japonica are discussed.Keywords-Alpinia japonica; Zingiberaceae; sesquiterpene; guaiane; secoguaiane; peroxide; X-ray analysis; 13C-NMR; biosynthesis
- Itokawa, Hideji,Morita, Hiroshi,Osawa, Kenji,Watanabe, Kinzo,Iitaka, Yoichi
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p. 2849 - 2859
(2007/10/02)
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