Benzyltriphenyl phosphonium

A siliceous support material (Cab-O-Sil) is deactivated with benzyltriphenyl phosphonium chloride and deposited on the inside wall of a glass capillary column. After additional coating with OV-225, a number of anticonvulsant drugs were run. 

Khalil, F. Y. Hanna, M. T. El-Batouti, M. Mikhail, A. A. The role of nucleophiles in the kinetics of decomposition of benzyltriphenyl-phosphonium chloride in different media. 

A solution of 0.87 g (37.5 mmol) of sodium in 30 mL of dry ethanol was dropped quickly under nitrogen into a stirred solution of 14.57 g (37.5 mmol) of benzyltriphenyl-phosphonium chloride in 150 mL of dry ethanol. The reaction mixture became turbid and pale yellow within 10 min at room temperature After having slowly added 12.00 g (37.5 mmol) of 4.14b in 50 mL of absolute ethanol the mixture was stirred for an additional 3 h. It turned colorless but was still turbid. Rota-evaporation afforded a residue which was heated for 10 min under reflux in 200 mL of hexane. Triphenylphosphane oxide was filtered off and the solvent removed from thfe filtrate. The remaining brown oil was purified by column chromatography (10 x 15 cm silica gel, petroleum ether (40-70 °C)/ether 10 1). Principally the stereoisomers could be separated by a second column chromatography. However, the ZJE mixture (Colorless oil, yield 12.40 g (84%)) was used in the following reaction step. 

A more detailed study of the polymerization of methyl methacrylate using anthracene sensitizer with benzyltriphenyl-phosphonium tetrafluoroborate initiator [113], indicates that the kinetics are more complicated than suggested by Eqs. (31) and (32). Specifically, the monomer can quench both photoexcited anthracene and the exciplex, [D R On+] in Scheme 7, leading to a nonlinear dependence of p on [M] where M is methyl methacrylate. In... 

The Wittig reaction is often used to form alkenes from carbonyl compounds. In this experiment, the isomeric dienes cis, trans-, and trans, fr ns-l,4-diphenyl-l,3-butadiene will be formed from cinnamaldehyde and benzyltriphenyl-phosphonium chloride. 

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