2: over Li-acetylide 3: 49 percent / Swern oxidation 4: Zn(BH4)2 / diethyl ether 5: LiAlH4 7: acid, H2O 8: NH2OH*HCl, pyridine 9: 5percent sodium hypochlorite, Et3N 10: H2, boric acid / W-2 Raney nickel 11: MsCl, DMAP 13: 97 percent / PPTS / methanol 14: CrO3, H2SO4 15: L-selectride 16: 75 percent / Na, liq. NH3 View Scheme