Catalysis today

Phosphonium ionic liquids as highly thermal stable and efficient phase transfer catalysts for solid–liquid Halex reactions

A Fan, GK Chuah, S Jaenicke

Index: Fan, Ao; Chuah, Gaik-Khuan; Jaenicke, Stephan Catalysis Today, 2012 , vol. 198, # 1 p. 300 - 304

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Citation Number: 5

Abstract

Trihexyl (tetradecyl) phosphonium tetrafluoroborate was found to be an active catalyst for the introduction of fluoride by nucleophilic aromatic substitution. With a decomposition temperature above 300° C, this ionic liquid is suitable for reactions at high temperatures. The addition of 1mol% of the ionic liquid relative to KF increased the initial rate for the fluorination of 1, 2-dichloro-4-nitrobenzene six-fold compared to the uncatalysed reaction. ...