1: 85 percent / NaOH, H2O / 20 h / Heating 2: 72 percent / NaOH / 1.) H2O, 2.) H2O, tert-BuOH, 18 h 3: 81 percent / BF3*Et2O / hexane; CH2Cl2 / 19 h View Scheme

1: 85 percent / NaOH, H2O / 20 h / Heating 2: 72 percent / NaOH / 1.) H2O, 2.) H2O, tert-BuOH, 18 h View Scheme

sodium hydroxide; water 20 h; Heating;