4-[tert-butyl(dimethyl)silyl]oxybutan-2-ol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: In N,N-dimethylformamide (30 ml) was dissolved 1,3-butanediol (3.00 g, 33.3 mmol), followed by the dropwise addition of an N,N-dimethylformamide solution (30 ml) of imidazole (2.72 g, 40.0 mmol) and t-butylchlorodimethylsilane (5.29 g, 35.0 mmol). After stirring at room temperature for 24 hours, ether was added to the reaction mixture and the white solid thus precipitated was filtered off. The resulting ether solution was washed with water and brine, dried over magnesium sulfate and then concentrated. The residue thus obtained was subjected to flash chromatography on a silica gel column, and the fraction obtained from the hexane:ethyl acetate=5:1 eluate was concentrated, whereby the title compound (5.43 g, 26.6 mmol, 80%) was obtained as a colorless oil. the white solid thus precipitated was filtered off The resulting ether solution was washed with water and brine dried over magnesium sulfate concentrated The residue thus obtained ethyl acetate=5:1 eluate was concentrated

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

Procedure: To triphenylphosphine (2.6 g, 10 mmol) in THF (50 mL) at 0° C. under argon, DEAD (1.6 mL, 10 mmol) added during 5 minutes. After stirring for 40 minutes at 0° C. 5-(3-chlorophenyl)-2H-tetrazole (0.90 g, 5 mmol) followed by a solution of 4-{[tert-butyl(dimethyl)silyl]oxy}butan-2-ol (1.53 g, 7.5 mmol) (Tett. 2003, 59, 4739-4748) in THF (5 mL) was added. Stirring at 0° C. for 10 minutes was followed by 21 h at r.t. The mixture was concentrated and purified by flash column chromatography (SiO2, Heptane-EtOAc 7:1) to give 1.8 g (98%) of the title compound. was added Stirring at 0° C. for 10 minutes was followed by 21 h at r.t The mixture was concentrated purified by flash column chromatography (SiO2, Heptane-EtOAc 7:1)

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: In N,N-dimethylformamide (30 ml) was dissolved 1,3-butanediol (3.00 g, 33.3 mmol), followed by the dropwise addition of an N,N-dimethylformamide solution (30 ml) of imidazole (2.72 g, 40.0 mmol) and t-butylchlorodimethylsilane (5.29 g, 35.0 mmol). After stirring at room temperature for 24 hours, ether was added to the reaction mixture and the white solid thus precipitated was filtered off. The resulting ether solution was washed with water and brine, dried over magnesium sulfate and then concentrated. The residue thus obtained was subjected to flash chromatography on a silica gel column, and the fraction obtained from the hexane:ethyl acetate=5:1 eluate was concentrated, whereby the title compound (5.43 g, 26.6 mmol, 80%) was obtained as a colorless oil. the white solid thus precipitated was filtered off The resulting ether solution was washed with water and brine dried over magnesium sulfate concentrated The residue thus obtained ethyl acetate=5:1 eluate was concentrated

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

Procedure: To triphenylphosphine (2.6 g, 10 mmol) in THF (50 mL) at 0° C. under argon, DEAD (1.6 mL, 10 mmol) added during 5 minutes. After stirring for 40 minutes at 0° C. 5-(3-chlorophenyl)-2H-tetrazole (0.90 g, 5 mmol) followed by a solution of 4-{[tert-butyl(dimethyl)silyl]oxy}butan-2-ol (1.53 g, 7.5 mmol) (Tett. 2003, 59, 4739-4748) in THF (5 mL) was added. Stirring at 0° C. for 10 minutes was followed by 21 h at r.t. The mixture was concentrated and purified by flash column chromatography (SiO2, Heptane-EtOAc 7:1) to give 1.8 g (98%) of the title compound. was added Stirring at 0° C. for 10 minutes was followed by 21 h at r.t The mixture was concentrated purified by flash column chromatography (SiO2, Heptane-EtOAc 7:1)