Ringtransformationen heterocyclischer Verbindungen, VI. 3-Nitrobenzonitrile aus 2,4,6-Triarylpyryliumsalzen und Nitroacetonitril
✍ Scribed by Zimmermann, Thomas ;Pink, Maren
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 293 KB
- Volume
- 1993
- Category
- Article
- ISSN
- 0947-3440
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✦ Synopsis
Ring Transformations of Heterocyclic Compounds, VI. – 3‐Nitrobenzonitriles from 2,4,6‐Triarylpyrylium Salts and Nitroacetonitrile
2,4,6‐Triarylpyrylium salts 1 react with nitroacetonitrile in the presence of sodium acetate, triethylamine, triethylamine/acetic acid or piperidine acetate to give 3‐nitrobenzonitriles 2. In the course of this 2 6‐[C~5~ + C] pyrylium ring transformation a nitro group is shifted to C‐3 of the benzene ring formed. Structural elucidation of the reaction products 2 is based on an X‐ray structure determination of the methoxyphenyl derivative 2c.
📜 SIMILAR VOLUMES
Es wird die Isolierung von Catalpol (1) aus Picrorhiza kurrooa (Scrophulariaceae) im 100g-MaDstab beschrieben. Aus Catalpol (1) wird nach einem einfachen Verfahren das (1 S,2S,6R,7R)-( -)-2-(Benzylthio)-7-hydroxy-3-oxabicyclo[4.3.O]nonan-9-on (4 a) hergestellt. Da 4a eine zentrale Zwischenverbindung