Water → HCID 54156548, compound

Participants

Reaction Steps

35.6 g of bis(4-hydroxy-3-tert.-butyl-phenyl)ethanoic acid (0.1 mol) were dissolved in a mixture of 222 g of n-butanol and 240 g of toluene. As an esterification catalyst, 1 g of p-toluene-sulfonic acid was added. Azeotropic distillation was continued until 1.8 mol of water had separated at the separator. The butanol-toluene phase was washed with 10% sodium bicarbonate solution and then with water. The solvent mixture was distilled off and the residue was dissolved and precipitated in 300 ml of heptane. After distillation of the solvent, 38 g (92 %, calculated on the acid used) of bis(4'-hydroxy-3'-tert-butyl-phenyl)ethanoic acid n-butyl ester were obtained, m.p. 124° C.

Provenance & Evidence