1: 90 percent / H2 / Rh/Al2O3 2: 94 percent / TBAF 3: 84 percent / Et3N, DMAP 4: 94 percent / pyridine 5: 83 percent / LiEt3BH 6: 95 percent / TBAF 7: (COCl)2, DMSO, Et3N 8: 75 percent / CrCl2 9: 74 percent / Pd(PPh3)2Cl2, Et2NH, CuI 10: 80 percent / TsNHNH2, NaOAc 11: 80 percent / PPTS / ethanol / 16 h / 75 °C View Scheme