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Intramolecular Photocycloaddition of 7,7′-Polymethylenedioxycoumarin

✍ Scribed by Luc Leenders; Prof. Dr. Frans C. De Schryver

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
111 KB
Volume
10
Category
Article
ISSN
0044-8249

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✦ Synopsis

We recently reported the intramolecular photocycloaddition of N,N'-alkylenedimaleimides~lJ and now wish to describe the analogous reaction of polymethylenedioxycoumarins ( I ) .

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Intramolecular [2+2] photocycloaddition
Intramolecular [2+2] photocycloaddition of enone-acetals
✍ Michael C. Pirrung; Stephen A. Thomson 📂 Article 📅 1986 🏛 Elsevier Science 🌐 French ⚖ 182 KB

Lewis acid catalyzed condensation of unsaturated orthofonnates with dienol ethers gives enone-acetals suitable for intramolecular photocycloadditions, yielding heterocyclic precursors to sesquiterpene lactones.