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Reagents and conditions: (a)512 [n-Bu4N][MnO4], pyridine, 70 °C, 24 h; (b) Ni(cod)2 (150 mol %), cod (150 mol %), 2,2′-bipyridyl (150 mol %), THF, 55 °C, 24 h; (c)513 naphthalene, Li, THF, 0 °C, 1 h; (d) (1) DDQ, DCM, 0 °C, then rt, 2 h, (2) N2H4·H2O, 0 °C; (e) NOSbF6 (1.0 equiv), DCM/MeCN, rt, 1 h; (f) NOSbF6 (2.1 equiv), DCM/MeCN, rt, 30 min.
