manganese(IV) oxide in dichloromethane T=20°C; 0.833333 h; Molecular sieve;

1: 2-bromobenzo[b]furan With n-butyllithium in tetrahydrofuran; hexane T=0°C; 2 h; 2: 4-fluorobenzaldehyde in tetrahydrofuran; hexane T=-78 - 20°C; 1 h; 3: With iodine; potassium carbonate in tert-butyl alcohol 12 h; Reflux;

1: sodium tetrahydroborate / methanol / 0.17 h / 20 °C 2: hydrogenchloride; water / acetonitrile / 0.42 h / 20 °C 3: manganese(IV) oxide / dichloromethane / 0.83 h / 20 °C / Molecular sieve View Scheme

1: SOCl2 View Scheme

sodium methylate; sodium hydride 1.) DMF, 70 deg C, 1.5 h, 2.) DMF, 70 deg C, 1.5 h; Multistep reaction;

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