Synthesis of N-alkylimidazolium salts and their utility as solvents in the Beckmann rearrangement

Tetrahedron Letters

Volumn 48, Issue 51, 2007, Pages 9059-9062

  Elango, Kandasamy ^a   Srirambalaji, Renganathan ^a   Anantharaman, Ganapathi ^a  

^a INDIAN INSTITUTE OF TECHNOLOGY KANPUR   (India)

Author keywords

Caprolactam; Anion exchange; Beckmann rearrangement; N Isopropylimidazolium bromide; N Methylimidazolium bromide; Reaction medium; Room temperature ionic liquids (RTILs)

Indexed keywords

AMIDE; ANION; BROMINE DERIVATIVE; CATION; IMIDAZOLE DERIVATIVE; IONIC LIQUID; OXIME DERIVATIVE;

ANION EXCHANGE; ARTICLE; BECKMANN REARRANGEMENT; CHEMICAL REACTION; CHEMICAL STRUCTURE; SYNTHESIS;

EID: 36248945083     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2007.10.051     Document Type: Article

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49. 3OH (5 mL). The resulting mixture was stirred at room temperature for 3 h. The solution was cooled to -20 °C, filtered and the volatiles were removed from the filtrate under vacuum to afford the respective ionic liquids.
50. Prior to the Beckmann rearrangement, all the ionic liquids were subjected to vacuum for half an hour to ensure complete removal of water.