1: 1.) (PhO)3PCH3I, 2.) Bu4NF / 1.) DMF, RT, 24 h, 2.) THF, RT, 4 h 2: 98 percent / aq. HCl / methanol / 2 h / Ambient temperature 3: 95 percent / NaBH4, MeOH / 2 h / 0 - 5 °C View Scheme

1: 1.) (PhO)3PCH3I, 2.) Bu4NF / 1.) DMF, RT, 24 h, 2.) THF, RT, 4 h 2: 98 percent / aq. HCl / methanol / 2 h / Ambient temperature View Scheme