The nitrosation of some y,&unsaturated B-diketo compounds affords the 3-substituted 4-oxo-5,6-dihydro-1,2,4ff-oxaxines. These compounds are converted to the isomeric 3-oxo-1-pyrroline l-oxides by a facile thermal rearrangement. In connection with our study of y,s-unsaturated 6-ketoesters1'2, we have
5,4′-dimethyl-2-methoxydiphenylether: a new product from the anodic oxidation of 4-methylanisole
✍ Scribed by J. Hlavatý
- Book ID
- 104678806
- Publisher
- Springer
- Year
- 1994
- Tongue
- English
- Weight
- 344 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0021-891X
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An efficient and stereodefined process is described for the first preparation of a new prenyl-benzoylfuranone type sesquiterpenoid, (±)-3-(2,4-dihydroxybenzoyl)-4,5-dimethyl-5-(4,8-dimethyl-3(E),7(E)-nonadien-1-yl)tetrahydro-2-furanone. The synthetic strategy is based on nucleophilic addition of org
Oxidation of' 3,4-dimethyl-l-phenylphosphole with peracids or peroxides gives a relatively stable P-oxide, which can be used in Diels-Alder reactions to give derivatives with the 7-phosphanorbornene framework. Oxygen insertion into a C-P bond of this framework occurs smoothly with m-chloroperbenzoic