Quaternary ammonium salts, phosphite

The primary use for 2,4-di-/ f2 -butylphenol is in the production of substituted triaryl phosphites. 2,4-Di-/ f2 -butylphenol reacts with phosphoms trichloride typically using a trialkylamine or quaternary ammonium salt as the catalyst. Hydrogen chloride is formed and either complexed with the amine or Hberated as free hydrogen chloride gas forming the phosphite ester, tris(2,4-di-/ f2 -butylphenyl)phosphite [31570-04-4] (58). The phosphite-based on... 

Jang and co-workers reported on the development of an enantioselective radical addition reaction to glyoxylate oxime ether for the preparation of a-amino acids under mild reaction conditions with chiral quaternary ammonium salts of hypophosphorous acid in aqueous media.26 The newly prepared chiral quaternary ammonium hypophosphites are inexpensive, less toxic than metal-containing compounds and the reaction conditions and workup are mild and simple (Table 7.2). It is also important to note that chiral quaternary hypo-phosphites are recyclable without altering their performance. The... 

Trialkyl phosphite reacts smoothly with quaternary ammonium salts to eliminate the nitrogen function and produce a phosphonate ester (132,236,292,295). 

Sodium hydroxide I chiral quaternary ammonium salts triethyl phosphite Cyclic a-hydroxyketones from ketones Asym. autoxidation under phase transfer catalysis... 

Chiral quaternary ammonium salts s. under NaOH Triethyl phosphite s. under NaOH Hydrogen peroxide s. under PhSe02H... 

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