## Ahatract-2Benxyloxypiperonal 15, a key intermediate in our synthesis of ( f ) -iso -/? -peltatin 7, was obtained by bromination of 4 -hydroxy -1,3 -benzodioxole 12, followed by treatment with (i) excess n-BuLi, (ii) N-methylformanilide, (iii) HCl/H,O, and (iv) benzyl chloride&CO,. The aromatic
Syntheses totales de la (+) iso β-peltatine
✍ Scribed by Eric Brown; Michel Loriot; Jean-Pierre Robin
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- French
- Weight
- 240 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
a-Hydroxyalkylation of a B-(2-alkoxy 3,4-methylenedioxy benzyl)-y-butyrolactone (17 or 25) with 3,4,5-tnmethoxybenzaldehyde or synngaldehyde ?& followed by cycll-__ __ satlon, afforded good yields of the corresponding (2) isopeltatins Les peltatines a kt B, respectivement 1 et & ont @te isol&es pour la premiere fols de Podophyllumpeltatum (1) Ces deux lignanes sont cytotoxiques et antitumoraux (2) L' ether m@thyllque 3 de la (-+) 8-peltatine a et@ is016 plus recemment de la plante mexicaine Bursera fagaroides (3) Ces compos@s se caractensent par une Jonction lactone trans, le substltuant phenyle etant pseudo-axial.
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