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Thermal and Electron Transfer Induced Reactions of Enediynes and Enyne-Allenes, 5. First Isolation of Two Rotamers About the PC Bond in a Phosphane Oxide

✍ Scribed by Schmittel, Michael ;Kiau, Susanne

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 397 KB
Volume: 1997
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.199719970415

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✦ Synopsis

Abstract

The thermal cyclization of the phosphane oxide substituted enyne‐allene 1d results in the formation of 4d, an unknown double‐bond shift isomer of the 11__H__‐benzo[b]fluorene system. Because of the completely hindered rotation about the PC bond, two rotamers could be isolated and identified on the basis of their spectral data. No thermal interconversion between the two rotamers was observed.

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