✦ LIBER ✦
Valenzisomerisierung von cis-dienonen IV. Die vier stereoisomeren Formen von 4-Methyl-6-phenyl-3, 5-hexadien-2-on
✍ Scribed by P. Schiess
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- German
- Weight
- 419 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
(Z,Z)‐4‐Methyl‐6‐phenyl‐3,5‐hexadien‐2‐one (5) is converted to its (Z,E)‐isomer 6 at 35° in the dark. This ready, uncatalysed cis,trans‐isomerization is shown to proceed through 2__H__‐pyran 9. Irradiation of either stereoisomeric dienone 6, 7 or 8 at 0° produces a photostationary mixture of 5, 6, 7 and 8 in which the (Z,Z)‐isomer 5 predominates.