Benzoyl trifluoromethanesulphonate. A highly efficient benzoylating agent for sterically hindered hydroxy groups

Reactions of benzoyl trifluoromethanesulphonate (BzOTf) with a variety of alcohols, including some with sterically hindered secondary and tertiary hydroxy goups, with phenolic compounds, and with 1,2-diols at low temperatures provide the corresponding benzoates in high yield.