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[2.2]γ-Pyronopyridinophane: Synthese und Untersuchungen zur konformativen Beweglichkeit

✍ Scribed by Flitsch, Wilhelm ;Niedenbrück, Matthias

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
368 KB
Volume
1991
Category
Article
ISSN
0947-3440

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✦ Synopsis

2.2γ‐Pyronopyridinophanes: Synthesis and Investigation of the Conformational Flexibility

The 2.2γ‐pyronopyridinophane 1 has been obtained via the bis(thio ether) 3 by oxidation with m‐chloroperbenzoic acid and subsequent pyrolysis. Bromination of the bis(sulfone) 6 and Ramberg‐Bäklund reaction gave the olefinic sulfone 9 which was transformed into the 2.2γ‐pyronopyridinophan‐1‐ene 2 by heating. The ring inversion of the heterophanes 1 and 2 was studied using dynamic NMR spectroscopy.

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