Abstract From the neutral fraction of the methanolic extract of the fruit of Alpiniaoxyphylla , a new pungent compound has been isolated, and is shown to be 1-(4′-hydroxy-3′-methoxyphenyl)-7-phenyl-3-heptanone. This compound is 125 times more pungent than zingerone.
Carbon–carbon double bond of α,β-unsaturated carbonyl compounds can be reduced selectively with hydrogen selenide, generated in situ by the reaction of elemental selenium with carbon monoxide and water in the presence of strongly basic tertiary amine.
Suppression of Inducible Nitric Oxide Synthase Expression by Yakuchinones and Their Analogues
作者:Hwa Jin Lee、Ji Sun Kim、Joung Wha Yoon、Hee-Doo Kim、Jae-Ha Ryu
DOI:10.1248/cpb.54.377
日期:——
Analogues of yakuchinones were synthesized as inhibitors of nitric oxide production in lipopolysaccharide-activated macrophage cell line, RAW 264.7 cells. We prepared stronger inhibitors than the original natural molecules, yakuchinones A and B reported from Alpinia oxyphylla. From the limited structural activity relation study of analogues, we concluded that the optimal length of linker between two aryl groups and the presence of enone moiety in the linker were identified as essential for the activity. The IC50 value of the most potent structure was 0.92 μM. The active analogues suppressed the expression of inducible nitric oxide synthase protein and mRNA.