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flakes (3.0 g, 1 wt equiv) and KMnO4 (18.0 g, 6 wt equiv), producing
a slight exotherm to 35£­40 ¡ãC. The reaction was then heated
to 50 ¡ãC and stirred for 12 h. The reaction was cooled to rt and
poured onto ice (400 mL) with 30% H2O2 (3 mL).¡±
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