1.1: DIBAH / tetrahydrofuran; hexane / 0.75 h / -78 °C 2.1: aq. NaClO2*H2O; NaH2PO4*2H2O; pyridine / 2-methyl-propan-2-ol; various solvent(s) / 5 h / 20 °C 3.1: PPh3; DEAD / toluene / 1 h / 20 °C 4.1: i-Pr2NEt2 / dimethylformamide / 3 h / 20 °C 5.1: aq. DDQ / CH2Cl2 / 1 h / 20 °C 6.1: CH3SO2Cl; NEt3 / CH2Cl2 / 0 °C 7.1: buffer / CH2Cl2 / 0 °C / pH 3 7.2: aq. Ca(OCl)2 8.1: borax buffer; MeOH / tetrahydrofuran / 8 h / 40 - 50 °C View Scheme