(3S)-butane-1,3-diol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 0° C. solution of (S)—(+)-1,3-butanediol (2.1 g, 23.3 mmol), imidazole (1.74 g, 25.6 mmol), and N,N-dimethylformamide (1.0 mL) in dichloromethane (40 mL) was treated with tert-butyl-dimethylsilyl chloride (3.68 g, 23.3 mmol). The reaction mixture was warmed to room temperature, stirred overnight, quenched with saturated aqueous ammonium chloride and extracted with dichloromethane. The combined dichloromethane layers were dried (MgSO4), filtered and concentrated to afford of the desired product of sufficient purity for subsequent use without further purification in near quantitative yield. quenched with saturated aqueous ammonium chloride extracted with dichloromethane The combined dichloromethane layers were dried (MgSO4) filtered concentrated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under ice cooling, to a dichloromethane solution (20.0 ml) of (S)-1,3-butanediol (519 mg) were added triethylamine (1.04 ml) and tert-butylchlorodiphenylsilane (1.63 ml), followed by stirring at room temperature overnight. The reaction solution was poured into a saturated aqueous ammonium chloride solution, and extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography to afford (2S)-4-{[tert-butyl(diphenyl)silyl]oxy}butan-2-ol (1.69 g). extracted with ethyl acetate The organic layer was washed with saturated sodium chloride solution dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by silica gel chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of (S)-1,3-butanediol (1.0 g) and triethylamine (1.12 g) in dichloromethane (30 ml) was added portionwise p-toluenesulfonyl chloride (2.12 g) at 0° C., and then the mixture was stirred at ambient temperature for 3hours and stand overnight. The resulting solution was dilueted with dichloromethane (30 ml) and the organic layer was washed successively with 1 N hydrochloric acid, saturated sodium bicarbonate aqueous solution and brine. Drying, filtering and removal of solvents afforded (S)-3-hyrdoxybutyl p-toluenesulfonate (2.26 g). stand overnight the organic layer was washed successively with 1 N hydrochloric acid, saturated sodium bicarbonate aqueous solution and brine Drying filtering removal of solvents

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of (S)-butane-1,3-diol (0.2450 g, 2.718 mmol), pyridine (1.50 mL, 18.5 mmol), and methylene chloride (10.0 mL, 156 mmol) at −15° C. was dropwise added benzoyl chloride (0.32 mL, 2.8 mmol). After 3.5 hours, methanesulfonyl chloride (0.300 mL, 3.88 mmol) was added to the reaction mixture, and the temperature was maintained at 0° C. After 1.5 hours, the reaction was warmed to room temperature. After 2 additional hours, triethylamine (1.0 mL, 7.2 mmol) was added. After one additional hour, the reaction mixture was poured into 50 mL dichloromethane and washed once with 50 mL water. The aqueous layer was extracted with an additional 50 mL of dichloromethane. The combined organic portions were dried over MgSO4, filtered, and evaporated in vacuo. The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes) to yield 0.3603 g (49%) of (S)-3-(methylsulfonyloxy)butyl benzoate. LCMS (ESI): M+H=273.2; 1H NMR (400 MHz, DMSO-d6) δ 7.99 (d, J=7.6 Hz, 2H), 7.66 (t, J=7.4 Hz, 1H), 7.53 (t, J=7.7 Hz, 2H), 4.94 (h, J=6.3 Hz, 1H), 4.45-4.26 (m, 2H), 3.17 (s, 3H), 2.09 (q, J=6.2 Hz, 2H), 1.42 (d, J=6.3 Hz, 3H). After 1.5 hours the reaction was warmed to room temperature washed once with 50 mL water The aqueous layer was extracted with an additional 50 mL of dichloromethane The combined organic portions were dried over MgSO4 filtered evaporated in vacuo The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of (S)-butane-1,3-diol (0.2450 g, 2.718 mmol), pyridine (1.50 mL, 18.5 mmol), and methylene chloride (10.0 mL, 156 mmol) at −15° C. was dropwise added benzoyl chloride (0.32 mL, 2.8 mmol). After 3.5 hours, methanesulfonyl chloride (0.300 mL, 3.88 mmol) was added to the reaction mixture, and the temperature was maintained at 0° C. After 1.5 hours, the reaction was warmed to room temperature. After 2 additional hours, triethylamine (1.0 mL, 7.2 mmol) was added. After one additional hour, the reaction mixture was poured into 50 mL dichloromethane and washed once with 50 mL water. The aqueous layer was extracted with an additional 50 mL of dichloromethane. The combined organic portions were dried over MgSO4, filtered, and evaporated in vacuo. The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes) to yield 0.3603 g (49%) of (S)-3-(methylsulfonyloxy)butyl benzoate. LCMS (ESI): M+H=273.2; 1H NMR (400 MHz, DMSO-d6) δ 7.99 (d, J=7.6 Hz, 2H), 7.66 (t, J=7.4 Hz, 1H), 7.53 (t, J=7.7 Hz, 2H), 4.94 (h, J=6.3 Hz, 1H), 4.45-4.26 (m, 2H), 3.17 (s, 3H), 2.09 (q, J=6.2 Hz, 2H), 1.42 (d, J=6.3 Hz, 3H). After 1.5 hours the reaction was warmed to room temperature washed once with 50 mL water The aqueous layer was extracted with an additional 50 mL of dichloromethane The combined organic portions were dried over MgSO4 filtered evaporated in vacuo The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 0° C. solution of (S)—(+)-1,3-butanediol (2.1 g, 23.3 mmol), imidazole (1.74 g, 25.6 mmol), and N,N-dimethylformamide (1.0 mL) in dichloromethane (40 mL) was treated with tert-butyl-dimethylsilyl chloride (3.68 g, 23.3 mmol). The reaction mixture was warmed to room temperature, stirred overnight, quenched with saturated aqueous ammonium chloride and extracted with dichloromethane. The combined dichloromethane layers were dried (MgSO4), filtered and concentrated to afford of the desired product of sufficient purity for subsequent use without further purification in near quantitative yield. quenched with saturated aqueous ammonium chloride extracted with dichloromethane The combined dichloromethane layers were dried (MgSO4) filtered concentrated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under ice cooling, to a dichloromethane solution (20.0 ml) of (S)-1,3-butanediol (519 mg) were added triethylamine (1.04 ml) and tert-butylchlorodiphenylsilane (1.63 ml), followed by stirring at room temperature overnight. The reaction solution was poured into a saturated aqueous ammonium chloride solution, and extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography to afford (2S)-4-{[tert-butyl(diphenyl)silyl]oxy}butan-2-ol (1.69 g). extracted with ethyl acetate The organic layer was washed with saturated sodium chloride solution dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by silica gel chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of (S)-1,3-butanediol (1.0 g) and triethylamine (1.12 g) in dichloromethane (30 ml) was added portionwise p-toluenesulfonyl chloride (2.12 g) at 0° C., and then the mixture was stirred at ambient temperature for 3hours and stand overnight. The resulting solution was dilueted with dichloromethane (30 ml) and the organic layer was washed successively with 1 N hydrochloric acid, saturated sodium bicarbonate aqueous solution and brine. Drying, filtering and removal of solvents afforded (S)-3-hyrdoxybutyl p-toluenesulfonate (2.26 g). stand overnight the organic layer was washed successively with 1 N hydrochloric acid, saturated sodium bicarbonate aqueous solution and brine Drying filtering removal of solvents

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of (S)-butane-1,3-diol (0.2450 g, 2.718 mmol), pyridine (1.50 mL, 18.5 mmol), and methylene chloride (10.0 mL, 156 mmol) at −15° C. was dropwise added benzoyl chloride (0.32 mL, 2.8 mmol). After 3.5 hours, methanesulfonyl chloride (0.300 mL, 3.88 mmol) was added to the reaction mixture, and the temperature was maintained at 0° C. After 1.5 hours, the reaction was warmed to room temperature. After 2 additional hours, triethylamine (1.0 mL, 7.2 mmol) was added. After one additional hour, the reaction mixture was poured into 50 mL dichloromethane and washed once with 50 mL water. The aqueous layer was extracted with an additional 50 mL of dichloromethane. The combined organic portions were dried over MgSO4, filtered, and evaporated in vacuo. The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes) to yield 0.3603 g (49%) of (S)-3-(methylsulfonyloxy)butyl benzoate. LCMS (ESI): M+H=273.2; 1H NMR (400 MHz, DMSO-d6) δ 7.99 (d, J=7.6 Hz, 2H), 7.66 (t, J=7.4 Hz, 1H), 7.53 (t, J=7.7 Hz, 2H), 4.94 (h, J=6.3 Hz, 1H), 4.45-4.26 (m, 2H), 3.17 (s, 3H), 2.09 (q, J=6.2 Hz, 2H), 1.42 (d, J=6.3 Hz, 3H). After 1.5 hours the reaction was warmed to room temperature washed once with 50 mL water The aqueous layer was extracted with an additional 50 mL of dichloromethane The combined organic portions were dried over MgSO4 filtered evaporated in vacuo The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of (S)-butane-1,3-diol (0.2450 g, 2.718 mmol), pyridine (1.50 mL, 18.5 mmol), and methylene chloride (10.0 mL, 156 mmol) at −15° C. was dropwise added benzoyl chloride (0.32 mL, 2.8 mmol). After 3.5 hours, methanesulfonyl chloride (0.300 mL, 3.88 mmol) was added to the reaction mixture, and the temperature was maintained at 0° C. After 1.5 hours, the reaction was warmed to room temperature. After 2 additional hours, triethylamine (1.0 mL, 7.2 mmol) was added. After one additional hour, the reaction mixture was poured into 50 mL dichloromethane and washed once with 50 mL water. The aqueous layer was extracted with an additional 50 mL of dichloromethane. The combined organic portions were dried over MgSO4, filtered, and evaporated in vacuo. The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes) to yield 0.3603 g (49%) of (S)-3-(methylsulfonyloxy)butyl benzoate. LCMS (ESI): M+H=273.2; 1H NMR (400 MHz, DMSO-d6) δ 7.99 (d, J=7.6 Hz, 2H), 7.66 (t, J=7.4 Hz, 1H), 7.53 (t, J=7.7 Hz, 2H), 4.94 (h, J=6.3 Hz, 1H), 4.45-4.26 (m, 2H), 3.17 (s, 3H), 2.09 (q, J=6.2 Hz, 2H), 1.42 (d, J=6.3 Hz, 3H). After 1.5 hours the reaction was warmed to room temperature washed once with 50 mL water The aqueous layer was extracted with an additional 50 mL of dichloromethane The combined organic portions were dried over MgSO4 filtered evaporated in vacuo The crude material was purified via flash chromatography on silica gel (40 g silica, solvent gradient: 0-100% ethyl acetate in heptanes)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 0° C. solution of (S)—(+)-1,3-butanediol (2.1 g, 23.3 mmol), imidazole (1.74 g, 25.6 mmol), and N,N-dimethylformamide (1.0 mL) in dichloromethane (40 mL) was treated with tert-butyl-dimethylsilyl chloride (3.68 g, 23.3 mmol). The reaction mixture was warmed to room temperature, stirred overnight, quenched with saturated aqueous ammonium chloride and extracted with dichloromethane. The combined dichloromethane layers were dried (MgSO4), filtered and concentrated to afford of the desired product of sufficient purity for subsequent use without further purification in near quantitative yield. quenched with saturated aqueous ammonium chloride extracted with dichloromethane The combined dichloromethane layers were dried (MgSO4) filtered concentrated