1: 88 percent / p-TsOH / tetrahydrofuran / Heating 2: 98 percent / pyridine; DMAP / CH2Cl2 / 20 °C 3: 83 percent / n-Bu4NHSO4; Oxone(R); NaHCO3 / (S,S)-(+)-N,N'-bis(3,5-di-tBuSal)-1,2-cHex-diNH2-Mn(III)Cl / acetonitrile; various solvent(s) / 0 °C 4: 81 percent / LiAlH4 / tetrahydrofuran / 2 h / 0 °C 5: zinc chloride / 110 °C 6: 92 percent / pyridine / CH2Cl2 / 20 °C View Scheme

lithium aluminium tetrahydride in tetrahydrofuran Heating;

1: 96 percent / MeSO3H; P2O5 / 70 °C 2: 83 percent / LiAlH4 / tetrahydrofuran / Heating View Scheme

1: 96 percent / MeSO3H; P2O5 / 70 °C 2: 83 percent / LiAlH4 / tetrahydrofuran / Heating View Scheme