Reagents and conditions (a) NaBH4, THF/ H2O; (b) (CH3SO2)2O, DMAP, CH3CN; (c) NaOH, MeOH, CH2Cl2; (d) DMAP, DMSO; (e) MnO2, Toluene; (f) NaBH4, CH3CN; (g) Acetic anhydride or benzoyl chloride, DMAP, CH2Cl2; (h) Trimethylphenylammonium chloride, CH3CN; (i) Na2CO3, MeOH