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Iron-Catalyzed Rearrangements and Cycloaddition Reactions of 2H-Chromenes

✍ Scribed by Luan, Yi; Sun, Huan; Schaus, Scott E.


Book ID
111903692
Publisher
American Chemical Society
Year
2011
Tongue
English
Weight
762 KB
Volume
13
Category
Article
ISSN
1523-7060

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Cycloaddition of 2H-Pyran-2-thiones with
✍ Albert Defoin; GΓ©rard Augelmann; Hans Fritz; Guillaume Geffroy; Christian Schmid πŸ“‚ Article πŸ“… 1985 πŸ› John Wiley and Sons 🌐 German βš– 961 KB

Reaction of pyran-2-thiones 4 with nitroso derivatives led surprisingly to type-8 (19) adducts which proved to be isomeric with the initially expected primary Diels-Alder cycloadducts 5. Methyl 2-thioxo-2H-pyran-5-carboxylate (40, when reacted with nitrosobenzene at -lo", led quantitatively to the t