Catalytic Beckmann rearrangement of ketoximes in ionic liquids
β Scribed by Jiajian Peng; Youquan Deng
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 54 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
Under mild conditions and without any additional organic solvents, Beckmann rearrangements of several ketoximes were performed in the catalytic media consisting of room temperature ionic liquid based on 1,3-dialkylimidazolium or alkylpyridinium salts and phosphorated compounds. Excellent conversion and selectivity was achieved for cyclohexanone oxime as the substrate, while Beckmann fragmentation of cyclopentanone oxime was observed.
π SIMILAR VOLUMES
Catalytic Beckmann rearrangement of cyclohexanone oxime in ionic liquids using P 2 O 5 or Eaton's reagent has been investigated. 1-n-Butyl-3-methylimidazolium hexafluorophosphate (bmiPF 6 ) gives superior results to those noted by earlier workers.
## Abstract The Beckmann rearrangement can be performed in ionic liquids using In(OTf)~3~ as catalyst under microwave irradiation.
## Abstract magnified image A series of novel gemini dicationic acidic ionic liquids (GDAILs), compounds **1**β**3** carrying two SO~3~H groups at the cation moieties and having anions of the type CF~3~SO$\rm{ \_3^ - }$, were synthesized in good yields (__Schemeβ 1__). Some physicochemical properti