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Ring-Chain Tautomerism of 3,5-Disubstituted 5,6,7,8-Tetrahydro-3H-3H-[1,2,4]oxadiazolo[4,3-c]pyrimidine, a Novel Heterocyclic Ring System

✍ Scribed by Korbonits, DezsÓ ;TóbiaAs-Héja, Erzsébet ;Simon, KÁLmÁN ;Kolonits, PÁL

Publisher: Wiley (John Wiley & Sons)
Year: 1991
Tongue: English
Weight: 507 KB
Volume: 124
Category: Article
ISSN: 0009-2940
DOI: 10.1002/cber.19911240931

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## Abstract Temperature‐dependent ^1^H‐ and ^13^C‐NMR spectra of the title compound are presented. Coalescence effects are discussed and assigned to two dynamic processes: (a) ring inversion of the nine‐membered ring, (b) racemization of the enantiomeric ground‐state conformations of the nine‐membe