- PHENYLPROPANOIDS AND OTHER DERIVATIVES FROM THAPSIA VILLOSA
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Key Word Index - Thapsia villosa; Umbelliferae; roots; phenylpropanoids; hemanticine; guaianolides; thapsivillosin K. - Five phenylpropanoids related to hemanticine have been obtained from Thapsia villosa roots.We propose for these substances the trivial names isohelmanticine, neohelmanticine, isoneohelmanticine, epoxyhelmanticine and epoxyhelmanticine angelate.All these substances are based on (1S,2R)1-(3-methoxy-4,5-methylenedioxyphenyl)-1,2-propanediol, which is esterified variously by acetic, angelic, epoxyangelic and/or (2R,3S)2,3-dihydroxy-2-methylbutyric acids.We also report three C6-guaianolides and their hydrolysis products.The name thapsivillosin K is proposed for a new guaianolide.
- Teresa, J. De Pascual,Moran, Joaquin R.,Hernandez, Jose M.,Grande, M.
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- ENZYMATIC ENANTIOSELECTIVE HYDROLYSIS OF 2,2-DIMETHYL-1,3-DIOXOLANE-4-CARBOXYLIC ESTERS
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2,2-dimethyl-1,3-dioxolane-4-carboxylic acid derived chiral building blocks were prepared from substituted α,β-unsaturated acids with high enantiomeric purities by enzymatic hydrolysis of their n.butyl esters.
- Pottie, M.,Eycken, J. Van der,Vandewalle, M.,Dewanckele, J. M.,Roeper, H.
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p. 5319 - 5322
(2007/10/02)
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