1: 2.) triethylamine / 1.) (+)-Eu(hfc)3 / 1.) hexane, -10 deg C - -20 deg C, 60 h; 2.) methanol, room temperature 2: 85 percent / trifluoroacetic acid / CH2Cl2 / 0 deg C, 1 h; room temperature, 2 h View Scheme