P-Toluenesulfomc acid

Sulfonic acids such as methanesulfomc acid and p toluenesulfomc acid are strong acids comparable m acidity with sulfuric acid... 

Apply sample solution then p-toluenesulfomc acid [102]... 

Certain fluorine compounds may be used to dehydrate nonfluorinated alcohols through their complexes or derivatives With aleohols, 1,1,1-trichlorotri-fluoroacetone forms intermediate hemiketals that easily decompose to olefins in the presence of a catalytic amount of p toluenesulfomc acid [S5] Similarly, the... 

Toluene, ot-nitro-, 56, 39 p-TolueneSUlfonates, reaction with organo-cuprates, 55,112 p Toluenesulfomc acid, 58, 57, 63 p-Toluenesulfonic acid, monohydrate, 56,... 

A solution of the dry D-glucose diethyl dithioacetal (10.725 g 37.5 mmol) 2-methoxypropene (3.245 g 45 mmol) in anhydrous DMF (130 mL) and p-toluenesulfomc acid (375 mg) was kept for 68 h at 0°C. The homogeneous mixture was kept with exclusion moisture until TLC indicated that all the starting material had reacted, and it was then poured into a solution of sodium hydrogenocarbonate (2% w/v, 60 mL). This mixture was extracted with ether (4 x 30 mL). The combined ether extracts woe washed with water (2 x 30 mL), dried (magnesium sulfate), and evaporated, giving yellowish crystals (8.275 g, 68%) that were recrystallized twice from dichlorometbane petroleum ether to give colorless crystals of 14 yield 5.735 g (47%), mp 73J-74.5°C, [a]D-ll° (c 2.027, methanol). 

N-Acylhexafluoroacetone umnes are prepared from hexafluoroacetone and carboxylic amides m the presence of p-toluenesulfomc acid (TsOH) [700] (equation 86)... 

Tohienesulfonic Acid. Toluene reacts readily with fuming sulfuric acid to yield toluene-sulfonic acid. By proper control of conditions, p-toluenesulfomc acid is obtained. The pnmaiy use is for conversion, by fusion wilh NaOH, to / -cresol. The resulting high purity -cresol is then alkylated wilh isobutylene to produce 2.6-di-fm-butyl-/ -cresol (BHT), which is used as an antioxidant in foods, gasoline, and rubber. Mixed cresols can be obtained by alkylation of phenol and by isolation from certain petroleum and coal-tar process streams. 

---