## Antimony pentafluoride promotes condensation of a,&unsaturated aldehydes ad ketones with diuzocarbony2 compowzds to form I,%disubstituted cycZopropyZcarbony2 compounds in preparativeZy useful yields. ## Isomerization of the cycZopropyba.rbonyt derivative by antimony pentaf'luoride produces the
Lewis acid-promoted 1,3-dipolar addition reactions of diazocarbonyl compounds. A general synthesis of oxazoles
โ Scribed by Michael P. Doyle; Mark Oppenhuizen; Robert C. Elliott; Mark R. Boelkins
- Book ID
- 104242660
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 237 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
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We would like to report that aliphatic and aromatic nitrile oxides (I), as exemplified by pivalonitrile oxide and I-chlorobenzonitrile oxide respectively, react with methyl imidates (II) at room temperature (in absolute ether) to yield 1.2,4-oxadiazoles of the type III (See Table ).