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31.43.1.1.2 Variation 2: Quaternization by Quaternary Ammonium Salts

DOI: 10.1055/sos-SD-031-02344

Tebby, J. C.; Allen, D. W.Science of Synthesis, (2007312086.

Arylphosphines readily displace a simple tertiary alkylamine from a quaternary ammonium salt under mild conditions and so the latter can also be used to quaternize arylphosphines. Thus, triphenyl(pyrrol-2-ylmethyl)phosphonium iodide (9) is prepared using the appropriate Mannich base methiodide (Scheme 5).[‌53‌]

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