1.1: Amberlyst 15 2.1: imid. 3.1: 78 percent / i-Pr2EtN 4.1: Bu3SnH; AIBN 4.2: SnBr4 / -78 °C 5.1: 80 percent / pyridine 6.1: 59 percent / Bu3SnH; AIBN 7.1: 91 percent / DDQ 8.1: 97 percent / Bu4NF 9.1: Dess-Martin periodinane 10.1: 99 percent / Dess-Martin periodinane 11.1: 74 percent / n-BuLi 12.1: DIBAL-H 13.1: Dess-Martin periodinane 14.1: 67 percent / Li(i-Pr)2N / -78 °C 15.1: 79 percent / Cl2CHCO2H 16.1: Dess-Martin periodinane 17.1: NaClO2 18.1: MgBr2; n-BuSH; K2CO3 19.1: 62 percent / 2,4,6-trichlorobenzoyl chloride; DMAP 20.1: 91 percent / CF3CO2H / CH2Cl2 21.1: DMDO / -50 °C View Scheme

1.1: Amberlyst 15 2.1: imid. 3.1: 78 percent / i-Pr2EtN 4.1: Bu3SnH; AIBN 4.2: SnBr4 / -78 °C 5.1: 80 percent / pyridine 6.1: 59 percent / Bu3SnH; AIBN 7.1: 91 percent / DDQ 8.1: 97 percent / Bu4NF 9.1: Dess-Martin periodinane 10.1: 99 percent / Dess-Martin periodinane 11.1: 74 percent / n-BuLi 12.1: DIBAL-H 13.1: Dess-Martin periodinane 14.1: 67 percent / Li(i-Pr)2N / -78 °C 15.1: 79 percent / Cl2CHCO2H 16.1: Dess-Martin periodinane 17.1: NaClO2 18.1: MgBr2; n-BuSH; K2CO3 19.1: 62 percent / 2,4,6-trichlorobenzoyl chloride; DMAP 20.1: 91 percent / CF3CO2H / CH2Cl2 View Scheme