Dynamische Stereochemie der Δ4‐1,4,2λ5‐Oxazaphospholine
- 3 February 1976
- journal article
- research article
- Published by Wiley in European Journal of Organic Chemistry
- Vol. 1976 (1) , 36-53
- https://doi.org/10.1002/jlac.197619760106
Abstract
Fur die Untersuchung regulärer Permutationsisomerisierungen (PI) wurden die Δ4‐1,4,2λ5‐Oxazaphospholine 3–7 durch Cycloaddition von Phosphiten 2 an N‐[2,2,2‐Trifluor‐1‐(trifluormethyl)äthyliden]‐ und N‐[2‐Chlor‐1‐chlordifluormethyl‐2,2‐difluoräthyliden]carboxamid 1 dargestellt. Die PI werden mittels NMR verfolgt. Als Mechanismen werden sowohl die Berry‐Pseudorotation (BPR) als auch die Turnstile‐Rotation (TR) diskutiert. Bei Berücksichtigung der experimentellen Ergebnisse und allgemein akzeptierter Vorstellungen scheint der (TR)2‐Mechanismus als der plausiblere.Keywords
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