N-alkyl-4-(N′,N′-dialkylamino)pyridinium salts: thermally stable phase transfer catalysts for nucleophilic aromatic displacement
作者:D.J. Brunelle、Daniel A. Singleton
DOI:10.1016/s0040-4039(01)91026-3
日期:1984.1
N-Alkyl salts of 4-dialkylaminopyridines are effective phase transfer catalysts which are up to 100 times more stable than tetrabutylammonium bromide to conditions encountered in nucleophilic aromatic substitution reactions. These salts are thermally stable to over 300°C, and promote reactions in non-polar solvents (or in the absence of solvent) at temperatures as high as 200°C.
4-二烷基氨基吡啶的N-烷基盐是有效的相转移催化剂,在亲核芳族取代反应中遇到的条件下,其稳定性比四丁基溴化铵高100倍。这些盐在超过300°C的温度下具有热稳定性,并能在高达200°C的温度下在非极性溶剂中(或在无溶剂的情况下)促进反应。