Thioglycolic Acid → [{2-(1,3-Benzodioxol-5-yl)-2-propyl}thio]acetic acid

Participants

Reaction Steps

600 ml of benzene, 59.5 g of mercaptoacetic acid and a catalytic amount of D-10-camphorsulfonic acid were added to 97 g of 2-(1,3-benzodioxol-5-yl)-2-propanol and the mixture was heated under reflux for 4 h. The solvent was distilled off and the pH of the residue was adjusted to 10 with 1N aqueous sodium hydroxide solution. After washing with ethyl acetate, 4N hydrochloric acid was added thereto under cooling with ice to acidity the aqueous layer. After extraction with chloroform, the extract was washed with water and dried over anhydrous magnesium sulfate. It was filtered and the filtrate was concentrated. The crystals thus formed were recrystallized form diisopropyl ether to obtain 62.70 g of the intended compound in the form of colorless crystals.

Provenance & Evidence