Die struktur von Americanin, einem neuen neolignan aus phytolacca Americana

Synthesis and biology of 1,4-benzodioxane lignan natural products

“…Americanin A (5) 66 was the rst of the americanin family to be isolated. Initially, it was given the structure now attributed to isoamericanin A (3), however this was later revised.…”

Neolignan Skeletons and Benzodioxanes Through Chiral Aryl Alkyl Ether Formation

“…The biosynthetic relationship between polymeric lignin and chiral neolignans is still unclear, and is at present a matter of some controversy (Davin et al 1997;Lewis 1999;Ralph et al 1997;Sederoff et al 1999). Efforts to define the roles of lignan/neolignan and lignin biosynthesis in plant cell wall structure and function, as well as efforts at developing new commercially viable lignan/neolignanbased products (Pelter and Hänsel 1975;Woo et al 1978;Arnoldi et al 1986;Ishibashi and Taniguchi 1989;Taniguchi et al 1989), will require access to pure enantiomers. Therefore, we endeavored to find a suitable route to the optically active 8-O-4' and benzodioxane neolignans.…”

Anti-Oxidative Compounds in Barley Tea

“…Compounds 1-9 were identified from the barley tea extract as p-hydroxybenzaldehyde (1), 5) p-hydroxyacetophenone (2), 5,7-dihydroxychromone (3), 6) naringenin (4), 3,4-dihydroxybenzaldehyde (5), 5) p-hydroxybenzoic acid (6), 5) vanillic acid (7), 5) p-coumaric acid (8), 5) and quercetin (9). The identification of these compounds was established by comparing the physical and spectral data with literature values.…”