2,3-and 2,5-Dicyanobenzobarrelenes 5 and 6 have been synthesized and subjected to triplet-sensitized photoisomerization. 2,3-Dicyanobenzobarrelene 5 gave two di-p-methane rearrangement products 7 and 8 and a [2p+2p]-cycloaddition product 9. However, 2,5-dicyanobenzobarrelene 6 formed a single di-p-m
The photochemistry of a phenylpropenyl allene; suppression of the di-π-methane rearrangement in an allenic system
✍ Scribed by D.C. Lankin; D.M. Chihal; G.W. Griffin; N.S. Bhacca
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- French
- Weight
- 283 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Recently, several studies have appeare d2 which focus on the question of the importance of C-4 substitution on the singlet di-v-methane rearrangement.
It has been demonstrated that the presence of pem-di-
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