Tri-n-hexylamine

Fig. 3. Conductivity curves of the copolymerization of 2-hydroxy-4-(2,3-epoxypropoxy)benzophenone (0.5 mol/1) with phthalic anhydride (0.5 mol/1) in o-xylene at 120 °C initiated by various initiators.57) 1 — tri-n-hexylamine (0.025 mol/1) 2 - tri-n-hexylamine (0.025 mol/1) and cyclohexanol (0.025 mol je 1) 3 — tri-n-hexylamine (0.025 mol/1) and benzoic acid (0.025 mol/1) 4 — hexadecyltrimethyl-ammonium bromide (0.005 mol/1)...

Fig. 6. Copolymerization of 2-hy-droxy-4-(2,3-epoxypropoxy)-benzo-phenone (HEB) (0.5 mol/1) with phtha-lic anhydride (0.5 mol/1) in o-xylene at 120 °C initiated by tri-n-hexylamine (0.025 mol/1) 4S>...

Eisenbraun EW (1963) The separation and fractionation of lignosulfonic acids from spent sulfite liquor with tri-n-hexylamine in organic solvents. Tappi 46 104-107 Felicetta VF, McCarthy JL (1957) Tappi 40 851-866 Forss KG, Pirhonen IMJ (1974) U.S. Patent No. 3825526... 

It is reported in the early literature that unsymmetrical amine oxides or those of high molecular weight cannot be prepared by the action of ozone on the amine. This study shows that an unsymmetrical amine oxide, such as N-ethylpiperidine oxide, and a symmetrical high molecular weight amine oxide, such as tri-n-hexylamine oxide, can be prepared by ozonization in methanol solution. 

The first three tertiary amines in the aliphatic series were studied by Strecker and Baltes. The authors studied tri-n-butylamine, tri-n-hexylamine, and tri-n-heptyl-amine. Each amine was ozonated at dry ice temperature and treated with picric acid. The tri-n-butylamine oxide picrate readily deposited as crystals on standing. Although the latter two amine oxides formed oily products at first, on long standing in the refrigerator they gave crystals of the amine oxide picrates. The purified amine oxide picrates were analyzed by direct titration with perchloric acid. 

Amines. Primary amines, RNHj, where R is alkyl, arylalkyl, or cycloalkyl, when boiled with Raney nickel (no Hj) are converted into the secondary amine (80% yield) and some tertiary amine (10%). n-Hexylamine —> di-n-hexylamine (70%) and tri-n-hexylamine (9%). The reaction is considered to involve dehydrogenation to the aldimine followed by addition of the starting amine, elimination of ammonia, and hydrogenation. 

Example 2 Extraction of Hydrochloric Acid by tri-n-Hexylamine (THA) to n-Octane... 

Nitrophenyladenosine S -Phosphate. 5 -Adenylic acid (4.2 g 12 mmoles) is converted to the pyridinium salt. Tri-n-hexylamine (3.23 g 12 mmoles) is added, and the mixture is evaporated in anhydrous pyridine about three times. Then, 5.84 g of 4-nitrophenol (42 mmoles) are added, and evaporation with anhydrous pyridine is repeated twice more. The final residue is taken up in a minimum amount of anhydrous pyridine in order to keep it in solution, and 8.65 g of iV,N -dicyclohexylcar-bodiimide are added. The reaction mixture is kept in the dark for 8 days at room temperature, after which it is evaporated under reduced pressure. The residual material is resuspended in the cold in 200 ml of methanol. Dicyclohexylurea is removed by filtration. The clear filtrate is dropped slowly into 2 liters of dry ether. The resulting precipitate is collected by centrifugation. It is dissolved in water and purified by pre-... 

In sub-FC, a detailed study of the influence of mobile phase additives on the chiral resolution of isoxazoline-based Ilb/IIIb receptor antagonists was carried out by Blackwell [145] on Chiralcel OD-H CSPs. The different mobile phase additives used were acetic acid, trifluoroacetic acid, formic acid, water, triethylamine, triethanolamine, n-hexylamine, trimethyl phosphate, and tri-w-butyl phosphate. In general, n-hexylamine and tri-/ -butyl phosphate mobile phase additives resulted in better resolution. The chiral separation of four 1,3-dioxolane derivatives on an amylose-based column has been described [151]. The effects of mobile phase composition, temperature, and pressure have been investigated. The nature of the modifier is the main parameter it has the highest impact on chiral resolution and is more important than the polarity of the mobile phase. Therefore, the organic modifier that gave the best enantiomeric separation was different for each compound. 

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