prov:value
| - solvent, such as chloroform, methylene dichloride, dimethyl formamide, nitromethane, toluene or acetonitrile in the presence of a catalystcomprising a mercuric halide, for example, mercuric bromide; a hydrogen chloride acceptor, for example, mercuric oxide, silver carbonate, silver oxide or cadmium carbonate; and a molecular seive, for example 5 A molecular sieve, to give a trifluoroacetylprotect
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