tert-butyl-(4-chlorobutoxy)-dimethylsilane

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: t-Butylchlorodimethylsilane (8.3 g, 55 mmol) was added to a stirred mixture of 4-chlorobutanol (5.0 mL, 50 mmol), silver nitrate (12.8 g, 75.1 mmol), and pyridine (4.0 mL, 50 mmol) in 40 mL of dry THF. After 4 hr, the reaction mixture was filtered through Celite and evaporated to give a yellow oil. The material was purified by distillation to provide 4-chlorobutyl t-butyldimethylsilyl ether as a colorless oil (11 g, quantitative). To a solution of triphenylmethane (5.10 g, 20.8 mmol) in 25 mL of dry THF at -78° C., 13.1 mL (21 mmol) of 1.6M n-butyllithium was added dropwise under nitrogen. Shortly thereafter, 4.29 g (19.3 mmol) of 4-chlorobutyl t-butyldimethylsilyl ether was added. After addition of water and extraction with hexane, the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane, providing t-butyldimethylsilyl 5,5,5-triphenylpentyl ether as an oil (6.85 g). This material was dissolved in THF (30 mL) and 16 mL of 1.0M tetrabutylammonium fluoride in THF was added. After 3 hr, the mixture was acidified with 1N HCl, extracted with three portions of ethyl acetate, and the extracts dried over magnesium sulfate and evaporated in vacuo. The product was purified by chromatography on silica gel with a 10%-20% gradient of ethyl acetate in hexane, providing the title compound as a white solid, 3.83 g (63% overall). the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane

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

Procedure: t-Butylchlorodimethylsilane (8.3 g, 55 mmol) was added to a stirred mixture of 4-chlorobutanol (5.0 mL, 50 mmol), silver nitrate (12.8 g, 75.1 mmol), and pyridine (4.0 mL, 50 mmol) in 40 mL of dry THF. After 4 hr, the reaction mixture was filtered through Celite and evaporated to give a yellow oil. The material was purified by distillation to provide 4-chlorobutyl t-butyldimethylsilyl ether as a colorless oil (11 g, quantitative). To a solution of triphenylmethane (5.10 g, 20.8 mmol) in 25 mL of dry THF at -78° C., 13.1 mL (21 mmol) of 1.6M n-butyllithium was added dropwise under nitrogen. Shortly thereafter, 4.29 g (19.3 mmol) of 4-chlorobutyl t-butyldimethylsilyl ether was added. After addition of water and extraction with hexane, the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane, providing t-butyldimethylsilyl 5,5,5-triphenylpentyl ether as an oil (6.85 g). This material was dissolved in THF (30 mL) and 16 mL of 1.0M tetrabutylammonium fluoride in THF was added. After 3 hr, the mixture was acidified with 1N HCl, extracted with three portions of ethyl acetate, and the extracts dried over magnesium sulfate and evaporated in vacuo. The product was purified by chromatography on silica gel with a 10%-20% gradient of ethyl acetate in hexane, providing the title compound as a white solid, 3.83 g (63% overall). the reaction mixture was filtered through Celite evaporated to give a yellow oil The material was purified by distillation

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

Procedure: t-Butylchlorodimethylsilane (8.3 g, 55 mmol) was added to a stirred mixture of 4-chlorobutanol (5.0 mL, 50 mmol), silver nitrate (12.8 g, 75.1 mmol), and pyridine (4.0 mL, 50 mmol) in 40 mL of dry THF. After 4 hr, the reaction mixture was filtered through Celite and evaporated to give a yellow oil. The material was purified by distillation to provide 4-chlorobutyl t-butyldimethylsilyl ether as a colorless oil (11 g, quantitative). To a solution of triphenylmethane (5.10 g, 20.8 mmol) in 25 mL of dry THF at -78° C., 13.1 mL (21 mmol) of 1.6M n-butyllithium was added dropwise under nitrogen. Shortly thereafter, 4.29 g (19.3 mmol) of 4-chlorobutyl t-butyldimethylsilyl ether was added. After addition of water and extraction with hexane, the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane, providing t-butyldimethylsilyl 5,5,5-triphenylpentyl ether as an oil (6.85 g). This material was dissolved in THF (30 mL) and 16 mL of 1.0M tetrabutylammonium fluoride in THF was added. After 3 hr, the mixture was acidified with 1N HCl, extracted with three portions of ethyl acetate, and the extracts dried over magnesium sulfate and evaporated in vacuo. The product was purified by chromatography on silica gel with a 10%-20% gradient of ethyl acetate in hexane, providing the title compound as a white solid, 3.83 g (63% overall). the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane

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

Procedure: t-Butylchlorodimethylsilane (8.3 g, 55 mmol) was added to a stirred mixture of 4-chlorobutanol (5.0 mL, 50 mmol), silver nitrate (12.8 g, 75.1 mmol), and pyridine (4.0 mL, 50 mmol) in 40 mL of dry THF. After 4 hr, the reaction mixture was filtered through Celite and evaporated to give a yellow oil. The material was purified by distillation to provide 4-chlorobutyl t-butyldimethylsilyl ether as a colorless oil (11 g, quantitative). To a solution of triphenylmethane (5.10 g, 20.8 mmol) in 25 mL of dry THF at -78° C., 13.1 mL (21 mmol) of 1.6M n-butyllithium was added dropwise under nitrogen. Shortly thereafter, 4.29 g (19.3 mmol) of 4-chlorobutyl t-butyldimethylsilyl ether was added. After addition of water and extraction with hexane, the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane, providing t-butyldimethylsilyl 5,5,5-triphenylpentyl ether as an oil (6.85 g). This material was dissolved in THF (30 mL) and 16 mL of 1.0M tetrabutylammonium fluoride in THF was added. After 3 hr, the mixture was acidified with 1N HCl, extracted with three portions of ethyl acetate, and the extracts dried over magnesium sulfate and evaporated in vacuo. The product was purified by chromatography on silica gel with a 10%-20% gradient of ethyl acetate in hexane, providing the title compound as a white solid, 3.83 g (63% overall). the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane

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

Procedure: t-Butylchlorodimethylsilane (8.3 g, 55 mmol) was added to a stirred mixture of 4-chlorobutanol (5.0 mL, 50 mmol), silver nitrate (12.8 g, 75.1 mmol), and pyridine (4.0 mL, 50 mmol) in 40 mL of dry THF. After 4 hr, the reaction mixture was filtered through Celite and evaporated to give a yellow oil. The material was purified by distillation to provide 4-chlorobutyl t-butyldimethylsilyl ether as a colorless oil (11 g, quantitative). To a solution of triphenylmethane (5.10 g, 20.8 mmol) in 25 mL of dry THF at -78° C., 13.1 mL (21 mmol) of 1.6M n-butyllithium was added dropwise under nitrogen. Shortly thereafter, 4.29 g (19.3 mmol) of 4-chlorobutyl t-butyldimethylsilyl ether was added. After addition of water and extraction with hexane, the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane, providing t-butyldimethylsilyl 5,5,5-triphenylpentyl ether as an oil (6.85 g). This material was dissolved in THF (30 mL) and 16 mL of 1.0M tetrabutylammonium fluoride in THF was added. After 3 hr, the mixture was acidified with 1N HCl, extracted with three portions of ethyl acetate, and the extracts dried over magnesium sulfate and evaporated in vacuo. The product was purified by chromatography on silica gel with a 10%-20% gradient of ethyl acetate in hexane, providing the title compound as a white solid, 3.83 g (63% overall). the reaction mixture was filtered through Celite evaporated to give a yellow oil The material was purified by distillation

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

Procedure: t-Butylchlorodimethylsilane (8.3 g, 55 mmol) was added to a stirred mixture of 4-chlorobutanol (5.0 mL, 50 mmol), silver nitrate (12.8 g, 75.1 mmol), and pyridine (4.0 mL, 50 mmol) in 40 mL of dry THF. After 4 hr, the reaction mixture was filtered through Celite and evaporated to give a yellow oil. The material was purified by distillation to provide 4-chlorobutyl t-butyldimethylsilyl ether as a colorless oil (11 g, quantitative). To a solution of triphenylmethane (5.10 g, 20.8 mmol) in 25 mL of dry THF at -78° C., 13.1 mL (21 mmol) of 1.6M n-butyllithium was added dropwise under nitrogen. Shortly thereafter, 4.29 g (19.3 mmol) of 4-chlorobutyl t-butyldimethylsilyl ether was added. After addition of water and extraction with hexane, the product was purified by chromatography on silica gel with 1:3 dichloromethane-hexane, providing t-butyldimethylsilyl 5,5,5-triphenylpentyl ether as an oil (6.85 g). This material was dissolved in THF (30 mL) and 16 mL of 1.0M tetrabutylammonium fluoride in THF was added. After 3 hr, the mixture was acidified with 1N HCl, extracted with three portions of ethyl acetate, and the extracts dried over magnesium sulfate and evaporated in vacuo. The product was purified by chromatography on silica gel with a 10%-20% gradient of ethyl acetate in hexane, providing the title compound as a white solid, 3.83 g (63% overall). the reaction mixture was filtered through Celite evaporated to give a yellow oil The material was purified by distillation

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

Procedure: Compound 7-a, 4-chloro-1-butanol, (CAS 928-51-8) (100 g, 920 mmol) was dissolved in CH2Cl2 (1000 mL) at room temperature. Imidazole (CAS 288-32-4) (81.5, 1200 mmol) and TBDMS-Cl (CAS 18162-48-6) (152 g, 1010 mmol) was added at 0° C. The mixture was stirred for 4 h at rt. The mixture was filtered off. The filtrate was washed with 10% aqueous HCl-solution and brine. After evaporation of the filtrate, we get the product 7-c as a clear oil (100 g, 50%). The mixture was filtered off The filtrate was washed with 10% aqueous HCl-solution and brine After evaporation of the filtrate, we

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

Procedure: Compound 7-a, 4-chloro-1-butanol, (CAS 928-51-8) (100 g, 920 mmol) was dissolved in CH2Cl2 (1000 mL) at room temperature. Imidazole (CAS 288-32-4) (81.5, 1200 mmol) and TBDMS-Cl (CAS 18162-48-6) (152 g, 1010 mmol) was added at 0° C. The mixture was stirred for 4 h at rt. The mixture was filtered off. The filtrate was washed with 10% aqueous HCl-solution and brine. After evaporation of the filtrate, we get the product 7-c as a clear oil (100 g, 50%). The mixture was filtered off The filtrate was washed with 10% aqueous HCl-solution and brine After evaporation of the filtrate, we

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

Procedure: A solution of (R)-tert-butyl 3-(3-chlorobenzoyl)piperidine-1-carboxylate (1.62 g, 5 mmol) in anhydrous THF (20 mL) under N2 was cooled in a dry ice-acetone bath. The Grignard reagent derived from tert-butyl-(4-chloro-butoxy)-dimethyl-silane (50 mL) prepared above was added dropwise. After addition, the mixture was allowed to warm to rt and stirred for 2 h (monitored by tlc). The reaction was quenched with satd aq NH4Cl (70 mL) and extracted with EtOAc (3×40 mL). The combined organic layers were washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by chromatography on silica gel eluting with 10:90 EtOAc/hexane to afford (R)-tert-butyl 3-((S)-5-(tert-butyldimethylsilyloxy)-1-(3-chlorophenyl)-1-hydroxypentyl)piperidine-1-carboxylate (1.65 g, 65%). 1H NMR (400 MHz, CDCl3): 0.02 (s, 6H), 7.30 (d, 2H), 0.85 (s, 9H), 1.47 (s, 9H), 1.92 (m, 3H), 2.52 (m, 3H), 3.56 (m, 2H), 3.63 (m, 2H), 3.97-4.21 (m, 2H), 4.36 (m, 1H), 7.16-7.25 (m, 3H), 7.36 (m, 1H). MS (E/Z): 512 (M+H+) prepared above was added dropwise After addition The reaction was quenched with satd aq NH4Cl (70 mL) extracted with EtOAc (3×40 mL) The combined organic layers were washed with brine dried over Na2SO4 concentrated in vacuo The residue was purified by chromatography on silica gel eluting with 10:90 EtOAc/hexane

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

Procedure: A solution of (R)-tert-butyl 3-(3-chlorobenzoyl)piperidine-1-carboxylate (1.62 g, 5 mmol) in anhydrous THF (20 mL) under N2 was cooled in a dry ice-acetone bath. The Grignard reagent derived from tert-butyl-(4-chloro-butoxy)-dimethyl-silane (50 mL) prepared above was added dropwise. After addition, the mixture was allowed to warm to rt and stirred for 2 h (monitored by tlc). The reaction was quenched with satd aq NH4Cl (70 mL) and extracted with EtOAc (3×40 mL). The combined organic layers were washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by chromatography on silica gel eluting with 10:90 EtOAc/hexane to afford (R)-tert-butyl 3-((S)-5-(tert-butyldimethylsilyloxy)-1-(3-chlorophenyl)-1-hydroxypentyl)piperidine-1-carboxylate (1.65 g, 65%). 1H NMR (400 MHz, CDCl3): 0.02 (s, 6H), 7.30 (d, 2H), 0.85 (s, 9H), 1.47 (s, 9H), 1.92 (m, 3H), 2.52 (m, 3H), 3.56 (m, 2H), 3.63 (m, 2H), 3.97-4.21 (m, 2H), 4.36 (m, 1H), 7.16-7.25 (m, 3H), 7.36 (m, 1H). MS (E/Z): 512 (M+H+) prepared above was added dropwise After addition The reaction was quenched with satd aq NH4Cl (70 mL) extracted with EtOAc (3×40 mL) The combined organic layers were washed with brine dried over Na2SO4 concentrated in vacuo The residue was purified by chromatography on silica gel eluting with 10:90 EtOAc/hexane