Solution photochemistry. IX A novel double rearrangement of a β,ψ-unsaturated ketone.
✍ Scribed by John R. Scheffer; Rockford A. Wostradowski
- Book ID
- 104236464
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- French
- Weight
- 185 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0040-4039
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The dimers(La & b) of dimethyl-and diethylcyclopentadienone ketals(la & b) undergo a novel 1,3-alkoxy-rearrangement to 4\_(a & b). Mild hydrolysis of 2 or 3 gives the monoketones (?a or b). On strong acid catalysed hydrolysis 2, 5. or 4 afford the cyciopentadienone-dimer(6) In contrast to the notor
## Abstract A new approach to the synthesis of α, β‐unsaturated ketones from 1,2,3‐trimethyl benzimidazolium salt via the condensation reaction with aldehydes followed by the addition reaction of Grignard reagents with quaternary C=N bond was provided.