T=125°C;

aluminium trichloride; benzene

1: 76 percent / NaH / dimethylformamide / 1.) 1 h; 2.) 60 deg C, 18 h 2: 21 percent / ceric ammonium nitrate, pyridine-2,6-dicarboxylic acid N-oxide / acetonitrile; H2O / 0.17 h View Scheme