Filtern
Volltext vorhanden
- nein (2)
Erscheinungsjahr
- 2016 (2) (entfernen)
Dokumenttyp
- Wissenschaftlicher Artikel (2) (entfernen)
Sprache
- Englisch (2)
Gehört zur Bibliographie
- ja (2)
Schlagworte
- microwave irradiation (2) (entfernen)
Institut
Allyl, dimethylallyl, crotyl, and prenyl ethers of various aromatic ortho-hydroxy carbonyl compounds undergo a tandem sequence of Claisen rearrangement, carbonyl olefination, and cyclization upon microwave irradiation in the presence of a stabilized ylide. The products are multiply substituted 6- or 8-allylated or prenylated coumarins (2H-chromen-2-ones).
para-Substituted aryl prenyl ethers undergo a deprenylation reaction upon microwave irradiation. This offers the opportunity to use a prenyl ether as a thermolabile protecting group in the synthesis of natural products with a chromone structure, which proceeds via a tandem deprenylation/6-endo-cyclization sequence.