Tert -Butyl acetate acetic anhydride method

The method also works well for bicyclic ketones such as nor-camphor (Eq. 27) and acyclic ketones such as pinacolone which afforded tert-butyl acetate in 96% yield. Reactions of benzocycloalkanones such as a-tetralone with the UHP-trifluoroacetic anhydride system also give the expected lactones in better yields than have previously been reported. The results are summarised in Eqs. (28) to (30). 

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