Chloride triphenylbenzylphosphonium

The manufacture of the majority of fluorocarbon elastomer gums includes the addition of an incorporated cure system comprising an organic onium cure accelerator, such as triphenylbenzylphosphonium chloride [1100-88-5] and a bisphenol cross-linking agent, such as... 

Keywords formylferrocene, triphenylbenzylphosphonium chloride, Wittig reaction, ferrocenylethene derivative... 

Quaternary onium salts. Quaternary ammonium salts include trioctymethylammo-nium chloride (Starks catalyst), Aliquat 336, tricaprylmethylammonium chloride, tetrabutylammo-nium hydrogen sulfate (Brandstrom s catalyst), and benzyltrimethylam-monium chloride (Mqkosza s catalyst) quaternary ammonium salts can also be generated in situ from trialkylamines, etc. Other quaternary onium salts include tetrabutylphospho-nium bromide, tetraphenylphosphonium bromide, triphenylbenzylphosphonium chloride, tetraphenylarsonium chloride, and triphenylsulfonium chloride, etc. Special quaternary salts are 4-aminopyridinium salts, bis-(quaternary ammonium) [R3N -(CH2) -NR3" R3N -(CH2) -0-(CH2) -NRj ] salts, 4,4 -dialkylbipyridinium salts, cluster quaternary ammonium [e.g., P(C6H4S03"NR4)3] salts, crown-quaternary salts [e.g. (18-crown-6)-(CH2)9PBuj Br ], and chiral V-(4-trifluoromethyl)benzylcinchonium bromide, etc. 

A suspension of triphenylbenzylphosphonium chloride in benzene converted to the ylid by refluxing with n-butyl- (or methyl-) lithium for 1 hr., powdered anhydrous Lil added, refluxing continued 1 hr., a soln. of p-chlorobenzonitrile in benzene added gradually, refluxed 2 days, the solvent removed, treated successively with methanol, water, and HGl, then refluxed 2 hrs. 4 -chloro-desoxybenzoin. Y 81%. - The nitrile is activated by Li-ion as a Lewis acid. This method seems to be superior to the usual Grignard method in the case of alkyl cyanides with a-hydrogen atoms. F. e. s. R. G. Earnhardt, Jr., and W. E. McEwen, Am. Soc. 89, 7009 (1967). 

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