The (+)-cis-chromanochromanones (2) and (3), representing the basic ringsystem of the natural insecticide rotenone, have been synthesised by a general procedure; the key step is 4-aroylation of the 4-phenyl-sulphonyl)chromans (7; Z=S02Ph). Rotenone (1) is the principle insecticide of Derris resin, a
Synthetic approach to grayanotoxins: a new method for the construction of the a-homograyanotoxane ring system
โ Scribed by Tetsuji Kametani; Hiroo Matsumoto; Toshio Honda; Keiichiro Fukumoto
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- French
- Weight
- 119 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0040-4039
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A IIEW ntethotl,for the cottsttwtiott qf iutegrable Hamiltortiatt system is proposed. For (I given Poisson mau~foki, I/W present proper comtructs new Poissott brackets 011 it by rnakittg WC qf the Dirtrc-Poissotr structrrre['J, m7d obtaitrs jirr/lrer 17cw integrrtble Hutuiltor7iatt s.vstems. Tl7c~ c