tetrachloromethane; tri-n-octyl phosphine T=20°C; 16 h; trioctylphosphine was added at 10 degree;C;

thionyl chloride; N,N-dimethyl-formamide in toluene T=90°C; 2 h; Product distribution / selectivity;

1.1: 82 percent 2.1: H2 / Pd/C / ethyl acetate / 20 °C 3.1: (COCl)2 / dimethylformamide / 20 °C 4.1: NaOH / toluene / 20 °C 5.1: LDA; LiCl / tetrahydrofuran / 0 °C 5.2: tetrahydrofuran / 20 °C / Heating 6.1: 66 percent / BH3*NH3; n-BuLi / tetrahydrofuran / 20 °C 7.1: POCl3; DMF / toluene / 80 °C View Scheme

1.1: 4-(N,N-dimethlyamino)pyridine / anhydrous dichloroethane / 0.5 h / 20 °C 1.2: 14.5 h / 10 - 30 °C 2.1: lithium hexamethyldisilazane / tetrahydrofuran / 2 h / -70 °C / Inert atmosphere 2.2: -70 - 5 °C 3.1: dihydrogen peroxide; lithium hydroxide hydrate / water; tetrahydrofuran / 0 - 30 °C 4.1: sodium tetrahydroborate / tetrahydrofuran / 1 h / 0 - 5 °C / Inert atmosphere 4.2: 5.75 h / 0 - 30 °C 5.1: N-chloro-succinimide; triphenylphosphine / dichloromethane / 5.5 h / -40 - 30 °C View Scheme

1.1: H2 / Pd/C / ethyl acetate / 20 °C 2.1: (COCl)2 / dimethylformamide / 20 °C 3.1: NaOH / toluene / 20 °C 4.1: LDA; LiCl / tetrahydrofuran / 0 °C 4.2: tetrahydrofuran / 20 °C / Heating 5.1: 66 percent / BH3*NH3; n-BuLi / tetrahydrofuran / 20 °C 6.1: POCl3; DMF / toluene / 80 °C View Scheme

1.1: hydrogen; acetic acid / palladium on activated charcoal / 60 - 70 °C / 2942.29 Torr 2.1: dihydrogen peroxide; lithium hydroxide hydrate / water; tetrahydrofuran / 0 - 30 °C 3.1: sodium tetrahydroborate / tetrahydrofuran / 1 h / 0 - 5 °C / Inert atmosphere 3.2: 5.75 h / 0 - 30 °C 4.1: N-chloro-succinimide; triphenylphosphine / dichloromethane / 5.5 h / -40 - 30 °C View Scheme

1.1: phosphorus tribromide / dichloromethane / 2.17 h / 0 - 5 °C 2.1: lithium hexamethyldisilazane / tetrahydrofuran / 2 h / -70 °C / Inert atmosphere 2.2: -70 - 5 °C 3.1: dihydrogen peroxide; lithium hydroxide hydrate / water; tetrahydrofuran / 0 - 30 °C 4.1: sodium tetrahydroborate / tetrahydrofuran / 1 h / 0 - 5 °C / Inert atmosphere 4.2: 5.75 h / 0 - 30 °C 5.1: N-chloro-succinimide; triphenylphosphine / dichloromethane / 5.5 h / -40 - 30 °C View Scheme

1: 90 percent / NaBH4; I2 / 96 h / 20 °C 2: 70 percent / SOCl2; pyridine View Scheme

1.1: LDA; LiCl / tetrahydrofuran / 0 °C 1.2: tetrahydrofuran / 20 °C / Heating 2.1: 66 percent / BH3*NH3; n-BuLi / tetrahydrofuran / 20 °C 3.1: POCl3; DMF / toluene / 80 °C View Scheme

1: 66 percent / BH3*NH3; n-BuLi / tetrahydrofuran / 20 °C 2: POCl3; DMF / toluene / 80 °C View Scheme