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Intensification of a Reaction by the Addition of a Minor Amount of Solvent: Diels—Alder Reaction of 2H-Pyran-2-ones with Alkynes.

✍ Scribed by Kristof Kranjc; Marijan Kocevar


Publisher
John Wiley and Sons
Year
2006
Weight
27 KB
Volume
37
Category
Article
ISSN
0931-7597

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New substituted 2-amino-3-cyano-4H-pyrans have been studied by electron ionization (EI), chemical ionization (CI) and electrospray ionization (ESI) mass spectrometry. The retro-Diels-Alder reaction (RDA) is the main fragmentation pattern observed in the EI spectra forming an unsaturated ketone as th