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Tetra-N-propylammonium perruthenate: a case study in catalyst recovery and re-use involving tetraalkylammonium salts

S V Ley1, C Ramarao, M D Smith

  • 1University Chemical Laboratories, Lensfield Road, Cambridge, UK CB2 1EW. svl1000@cam.ac.uk

Chemical Communications (Cambridge, England)
|September 21, 2002
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Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation.
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...