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A Diels—Alder Synthesis of Pyridines.

✍ Scribed by J. B. Hendrickson; Jian Wang


Publisher
John Wiley and Sons
Year
2004
Weight
99 KB
Volume
35
Category
Article
ISSN
0931-7597

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✦ Synopsis


Abstract

For Abstract see ChemInform Abstract in Full Text.


📜 SIMILAR VOLUMES


Intramolecular Diels-Alder reactions of
✍ Bart Geurtsen; Dick A. de Bie; Henk C. van der Plas 📂 Article 📅 1989 🏛 Elsevier Science 🌐 French ⚖ 807 KB

Quaternization of alkynyl substituted pyrazines with triethyloxonium tetrafluoroborate in dichloromethane occurs exclusively at N-4 yielding 3-alkynyl-lethylpyrazinium salts, as shown by the 13C NMR data. Protonation of the same pyrazines with trifluoroacetic acid also occurs at N-4. The quaternary