1: 1.) n-BuLi, 2.) MgBr2 / 1.) ether, hexane, -78 deg C, 5 min, 2.) warmed to room temperature 2: 280 mg / 50percent NaOH / ethanol / 2 h / Heating 3: air oxidation View Scheme

1: 1.) n-BuLi, 2.) MgBr2 / 1.) ether, hexane, -78 deg C, 5 min, 2.) warmed to room temperature 2: 280 mg / 50percent NaOH / ethanol / 2 h / Heating View Scheme