[3-(Dimethylamino)propyl]triphenylphosphonium bromide hydrobromide

3607-17-8

124-40-3

27710-82-3

To a suspension of (3-bromopropyl)triphenylphosphonium bromide (1.0 g, 2.1 mmol) in ethanol (5 mL) was slowly added 40% aqueous dimethylamine (3 mL) at room temperature. The reaction mixture was transferred to a sealed microwave reaction tube and heated at 100 °C with stirring for 30 min. Upon completion of the reaction, the solvent was removed by distillation under reduced pressure to give the crude product. The crude product was purified by recrystallization in acetonitrile to afford [3-(dimethylamino)propyl]triphenylphosphonium bromide hydrobromide (0.90 g, 82% yield) as a white solid, which was used directly in the subsequent reaction.ESI MS m/z 348.3 (corresponding to Ph3PCH2CH2CH2CH2NMe2+ ions).