1.1: Na2CO3; 4 Angstroem molecular sieves / 2 h / 0 °C 2.1: 4 Angstroem molecular sieves / ethanol / 14 h / 80 °C 2.2: 37 percent / acetic acid; water / ethanol / 3 h / 80 °C 3.1: 59 percent / toluene / 24 h / Heating 4.1: 78 percent / LiAlH4; AlCl3 / tetrahydrofuran / 3.5 h / -78 - 20 °C 5.1: 71 percent / hydrogen / Pd(OH)2/C / ethyl acetate / 15 h / 20 °C 6.1: 60 percent / TFA / CH2Cl2 / 0.25 h / 20 °C View Scheme