sodium hydroxide; boron trichloride 1.) dichloromethane, 2.) methanol, pyridine, 18 h, reflux; Yield given. Multistep reaction;

1: 1.) boron trichloride, 2.) 2M aq. sodium hydroxide / 1.) dichloromethane, 2.) methanol, pyridine, 18 h, reflux 2: 2.6 g / 45percent w/v HBr-glacial acetic acid / 4 h / Heating View Scheme