A method for the deprotection of 2-(trimethylsilyl)ethyl (TMSE) esters is d
escribed. Treatment of carboxylic esters with NaH in DMF cleanly produces t
he deprotected acid after extractive work-up. This method can be applied to
sterically-hindered substrates as well as esters containing fluoride-labil
e functionality. A tandem alkylation/ester deprotection procedure is also p
resented. (C) 2001 Published by Elsevier Science Ltd.