Ammonium acetate tetramethylammonium salts

Recently Wilson and Joule 158> studied the demethylation of a variety of quaternary ammonium acetates in aprotic solvents. Earlier Lawson and Collie 92> showed that the decomposition of solid tetramethylammonium acetate at 180—200 °C gives the methyl ester in good yield. However, the use of an aprotic solvent significantly lowers the temperature (60—140 °C) required for decomposition. This reaction is most useful for the demethylation of aromatic quaternary ammonium salts that are soluble in benzene or benzene-chloroform mixtures. Its application to aliphatic quaternary ammonium salts requires a longer time, although N,N-dimethylpiperidinium acetate was demethylated at 100 °C in xylene-... 

Diethylamine acetate Pyridinium salt Tetramethylammonium acetate. Tetraethyl-ammonium -, Tetra-butylammonium -Piperidinium acetate Isoxazolium salts Trialkyloxonium salt Amidinium salts Ketenimines Hy dr azobenzene Diazo compounds Diazomethane, Phenyl-diazomethane K-methyldiazotate Hexamethylenetetramine Azo compds.. Azobenzene Azodicarboxamide ROOC N N COOR Azodiisobutyronitri le Triazenes Azidinium salts p-Nitrobenzene-diazonium sulfate Sulfanilic acid, diazotized... 

Carboxylic acid methyl esters. A methanolic soln. of oleanolic acid containing phenolphthalein as indicator titrated with a soln. of tetramethylammonium hydroxide in the same solvent, which is then removed by distillation, and the residual tetramethylammonium salt heated under reduced pressure with distillation of the resulting trimethylamine -> methyl oleanolate. Y 83%. F. e. s. V. Prelog and M. Piantanida, H. 244, 56 (1936) by gas-diromatography s. A. S. Hyman, J. Chromatogr. 45, 132 (1969) ethers from quaternary ammonium hydroxides and acetates cf. J. MacGee and K. G. Allen, Steroids 16, 19 (1970). 

Acetates of organic bases Diethylamine acetate Pyridinium salt Tetramethylammonium acetate, Tetraethyl-ammonium-Piperidinium acetate Isoxazolium salts Trialkyloxonium salt Amidinium salts Ketenimines Diazomethane K-methyldiazotate... 

---