1: 80.9 percent / sodium tert-pentylate / toluene / 3 h / Heating 2: 39.3 percent / CF3COOH / CH2Cl2 / 1.) 0 deg C, 2.5 h, 2.) r.t., 15 h 3: 98.2 percent / hydrogen / tris(triphenylphosphine)rhodium(I) chloride / benzene / 18 h / 55 °C / 7500.6 Torr View Scheme

sodium tert-pentoxide in toluene 3 h; Heating;