Table 2.
Scope of the trifluoromethylation reaction of heterocyclic N-oxides.a
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Reaction conditions: heterocyclic N-oxide (0.2 or 0.5 mmol), 1 (1.5 equiv), KOt-Bu (3 equiv), 3Å MS, THF (c=0.2 M), at −20 °C under Ar for 50 min.
Scope of the trifluoromethylation reaction of heterocyclic N-oxides.a
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Reaction conditions: heterocyclic N-oxide (0.2 or 0.5 mmol), 1 (1.5 equiv), KOt-Bu (3 equiv), 3Å MS, THF (c=0.2 M), at −20 °C under Ar for 50 min.