Jj. Folmer et Sm. Weinreb, GENERATION OF ESTERS FROM CARBOXYLIC-ACIDS USING APPEL SALT (4,5-DICHLORO-1,2,3-DITHIAZOLIUM CHLORIDE), Tetrahedron letters, 34(17), 1993, pp. 2737-2740
Esters can be generated directly in good yields under mild conditions
from the corresponding carboxylic acid and alcohol using Appel's salt
(4,5-dichloro-1,2,3-dithiazolium chloride) and 2,6-lutidine.