1: 89 percent / HCl 2: H2 View Scheme

Multi-step reaction with 7 steps 1: 90 percent / TBHP, VO(acac)22: 67 percent / H5IO6 / tetrahydrofuran; H2O3: diethyl ether / -78 - 0 °C4: 95 percent / PPTS5: 78 percent / LiAlH4 6: 98 percent / pyridine7: 92 percent / n-Bu4NF  

Multi-step reaction with 5 steps 1: diethyl ether / -78 - 0 °C2: 95 percent / PPTS3: 78 percent / LiAlH4 4: 98 percent / pyridine5: 92 percent / n-Bu4NF  

Multi-step reaction with 4 steps 1: 95 percent / PPTS2: 78 percent / LiAlH4 3: 98 percent / pyridine4: 92 percent / n-Bu4NF  

With  hydrogenchloride