In the presence of silver tetrafluoroborate, S-ethyl carbothioates reacted with 1-alkynyltrimethylsilanes to give the corresponding acetylenic ketones in good yields.
Carboxylic α-bromo--toluic anhydrides and alkyl α-bromo--toluates were activated by silver salts and used for the acylation of trimethylsilylacetylenes to acetylenic ketones and alkylation of aromatic compounds, respectively.