✦ LIBER ✦
A free-rotor effect in β,γ-unsaturated ketone photochemistry. the diverging singlet and triplet reactions of 3-ethylidene-2,2,5,5-tetramethylcyclohexanone
✍ Scribed by Kenneth G. Hancock; Ronald O. Grider
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- French
- Weight
- 243 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
We recently reported the singlet-state photochemical rearrangement of 3-methylene-2,2,5,5-tetramet~lcyclohexanone (1) via a 1,3-sigmatropic acyl shift to 3,3-dimethyl-5-isopropylidenecyclohexanone (g).", However, 17~-acetoyy-4,4-dimetQrl-19-norandrost-5-en-3-one (3)isknown to undergo a triplet-state 1,2-acyl shift to the cycloproWlketone steroid Cft) .5 Asapartial