Ji. Trujillo et As. Gopalan, FACILE ESTERIFICATION OF SULFONIC-ACIDS AND CARBOXYLIC-ACIDS WITH TRIETHYLORTHOACETATE, Tetrahedron letters, 34(46), 1993, pp. 7355-7358
Triethylorthoacetate was found to be surprisingly more effective than
triethylorthoformate in the esterification of sulfonic acids and carbo
xylic acids. Using this reagent, esters of sulfonic and carboxylic aci
ds are prepared in high yields.