1: LDA / tetrahydrofuran / 1.) - 78 deg C, 2.) -78 deg C to r.t. 2: SOCl2, pyridine / tetrahydrofuran / 18 h / Ambient temperature 3: K2CO3 / acetone / 11 h / Heating View Scheme

1: 1.) LDA / 1.) THF, -78 deg C; 2.) THF, 0 deg C 2: tetrahydrofuran 3: trifluoroacetic acid / Ambient temperature 4: 85 percent / NaBH4 / methanol View Scheme