A method for the cleavage of t-butyl esters using silica gel in refluxing t
oluene is reported. Good yields of the corresponding carboxylic acids are o
btained, and the reaction is selective for t-butyl esters over t-butyl ethe
rs and trimethylsilylethyl (TMSE) esters. (C) 2001 Elsevier Science Ltd. Al
l rights reserved.