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aConditions: 0.05 mmol of 1, 0.15 mmol of 2, 0.20 mmol of 3. Isolated yields of products after purification by chromatography are reported. bReaction performed with 0.05 mmol of 1-[3-methylphenyl]pyrazole, 0.15 mmol of aryl dioxazolone, 0.10 mmol of benzonorbornadiene.
