1.1: 97 percent / NaH; n-Bu4NI / 16 h / 20 °C 2.1: IDCP / CH2Cl2 / 1 h / 20 °C 3.1: 7.8 g / Zn / aq. ethanol / 1 h / Heating 4.1: 9-BBN / tetrahydrofuran / 0 - 20 °C 4.2: 86 percent / aq. H2O2; aq. NaOH / 0 °C 5.1: 84 percent / DMSO; (COCl)2; Et3N / CH2Cl2 / -78 - 20 °C 6.1: DDQ; Et3N / CH2Cl2; H2O / 3 h / 20 °C 7.1: 69 percent / HCO2NH4; NaCNBH3; 4 Angstroem MS / methanol / 24 h / 20 °C 8.1: HCOOH / Pd/C / methanol / 2 h 9.1: 39 mg / 6N HCl / tetrahydrofuran / 2 h / 20 °C View Scheme