New neolignan and phenylpropanoid glycosides in Juniperus communis var. depressa
Two new neolignan glucosides (junipercomnosides C and D) and two new phenypropanoid glycosides (junipercomnosides E and F) were isolated from aerial parts of Juniperus communia var. depressa along with seven known phenylpropanoid glycosides. The structures of the isolated compounds were determined by spectral analysis, in particular by the detailed analysis of 2D NMR and CD spectra.
First asymmetric synthesis of chiral 1,4-benzodioxane lignans
An asymmetric and regioselective total synthesis approach to 1,4-benzodioxane lignans was reported in which (2R,3R)- and (2S,3S)-3-(4-hydroxy-3-methoxyphenyl)-2-hydroxymethyl-1,4-benzodi oxan-6-carbaldehyde were synthesized firstly. A natural 1,4-benzodioxane neolignan was synthesized firstly by the synthesis approach. (C) 2000 Elsevier Science Ltd.
Gu,Jing,Pan,Chan,Yang
p. 6079 - 6082
(2007/10/03)
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