P-t-Butylbenzoic acid

The Effect of p-t-Butylbenzoic Acid on Terpolymer Sensitivity TABLE III... 

To a round flask which has been well dried and flushed with nitrogen are added 85.0 g (1.1 mol) of sodium amide (50% suspension in toluene) and 180.0 g of isopropyl ether and there are now added dropwise thereto at a temperature of 50°-60°C 150.2 g (1 mol) of acetylanisole in 180.0 g of isopropyl ether. Reaction sets in immediately and a white paste-like mass forms. After completion of the addition, the mixture is stirred for a further 0.5 h and then 192.3 g of p-t-butylbenzoic acid methyl ester are added rapidly at 25°-30°C. The mixture is stirred for 0.5 h at room temperature, then for 3 h at 60°-70°C and left to stand for 12 h. 200.0 g of ice are then added and the mixture is acidified with 128.0 g (1.1 mol) of technical hydrochloric acid and 200 ml of ice-water. The mixture is stirred until the sodium salt of the product has dissolved. The phases are separated and the organic phase is washed with ice-water until neutral. The organic phase is concentrated on a rotary evaporator and there are thus recovered 290.0 g of isopropyl ether. The yield of 4-(l,l-dimethylethyl)-4 -methoxydibenzoylmethane, melting point 83.5°C is 199.8 g (64.5%) (recrystallisation from methanol). 

Crystallization takes place in two stages nucleation and the growth of nuclei. Nucleation is important not only because it induces crystallization, but because it may also determine the various crystal structures. If, for example, one adds by weight p-t-butylbenzoic acid to... 

When these types of cutting fluids are manufactured, they typically will contain an ethanolamine salt or some form of emulsifying agent that is used to get the oil in solution. Many of the best formulations will contain triethanolamine salts because of their excellent ability to address what the chemist is looking for—typically, lubricity and anticorrosion protection. Typical ethanolamine salts of t-butylbenzoic acid, pentylbenzoic acid, hexylbenzoic acid, and p-butoxybenzoic acid have been chosen due to their favorable characteristics from the standpoint of cost, solubility, corrosion resistance, and load ability [3],... 

BBA. See N-Benzyl-N-t-butylamine p-t-BBA. See 4-t-Butylbenzoic acid BBAB. See 1,4-Bis (bromoacetoxy)-2-butene BBDT. See 4-t-Butyl-1,2-benzenedithiol BBOT. See 2,2 -(2,5-Thiophenediyl) bis [5-t-butylbenzoxazole]... 

Tetrabromobisphenol A 4-TBBA p-TBBA. See 4-t-Butylbenzoic acid TBBA-AE. See Tetrabromobisphenol A bis (allyl ether)... 

Potassium butyl paraben C11H14O2 Benzyl butyrate Benzyl isobutyrate Butyl benzoate 4-t-Butylbenzoic acid a,a-Dimethylphenethyl formate Ethyl-3-phenylpropionate Hydratropyl acetate Hydrocinnamyl acetate Isobutyl benzoate Isopropyl phenylacetate 4-p-Methoxyphenyl-2-butanone a-Methylbenzyl propionate Methyl eugenol Methyl isoeugenol Methyl 4-phenyl butyrate Phenethyl propionate Propenylguaethol Propyl phenylacetate o-Tolyl isobutyrate p-Tolyl isobutyrate C11H14O3 Anisyl propionate Butylparaben t-Butyl perbenzoate Butyl salicylate Isobutylparaben Isobutyl salicylate Phenoxyethyl propionate Phenylacetaldehyde glyceryl acetal... 

Di-t-butylbenzo[c ]furan (454) was postulated as an intermediate in the base catalyzed dehydrobromination of (453) to yield the diketone (455) (69TL5215). However, (457) has been prepared by treatment of 1-phenylphthalide (456) with t-butylmagnesium chloride and subsequent dehydration with p-toluenesulfonic acid. 

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