tert-butyl 6-bromohexanoate

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

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

Procedure: In a manner similar to that of Example 1(a), by reaction of 2.36 g (5.8 mmol) of ethyl 3-[3-(3-hydroxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthyl)-4-methoxyphenyl]acrylate obtained in Example 13(f) with 1.6 g (6.3 mmol) of tert-butyl 6-bromohexanoate obtained above, 3.3 g (100%) of the expected compound were obtained in the form of a yellow oil.

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

Procedure: 6-Bromohexanoyl chloride (2 g, 9.37 mmol) was added to t-butanol (6.98 g, 93.7 mmol) under an inert atmosphere. The reaction mixture was stirred overnight and then was concentrated in vacuo, dissolved in ethyl acetate (150 ml), washed with saturated aqueous sodium bicarbonate and 10% aqueous citric acid, and dried over magnesium sulfate to yield t-butyl 6-bromohexanoate (2.02 g, 80% yield). was concentrated in vacuo dissolved in ethyl acetate (150 ml) washed with saturated aqueous sodium bicarbonate and 10% aqueous citric acid dried over magnesium sulfate

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

Procedure: A mixture of 6-hydroxy-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one (0.50 g, 1.9 mmol), tert-butyl 6-bromohexanoate (1.25 g, 4.9 mmol) and potassium carbonate (0.54 g, 3.9 mmol) and DMF (10 ml) was stirred at room temperature for 24 hrs. The reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with water and dried. The solvent was evaporated. The obtained crystals were recrystallized from ethyl acetate-hexane to give the titled compound (0.75 g, 90%). extracted with ethyl acetate The extract was washed with water dried The solvent was evaporated The obtained crystals were recrystallized from ethyl acetate-hexane

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

Procedure: In a manner similar to that of Example 1(a), by reaction of 2.36 g (5.8 mmol) of ethyl 3-[3-(3-hydroxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthyl)-4-methoxyphenyl]acrylate obtained in Example 13(f) with 1.6 g (6.3 mmol) of tert-butyl 6-bromohexanoate obtained above, 3.3 g (100%) of the expected compound were obtained in the form of a yellow oil.

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

Procedure: In a manner similar to that of Example 1(a), by reaction of 2.36 g (5.8 mmol) of ethyl 3-[3-(3-hydroxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthyl)-4-methoxyphenyl]acrylate obtained in Example 13(f) with 1.6 g (6.3 mmol) of tert-butyl 6-bromohexanoate obtained above, 3.3 g (100%) of the expected compound were obtained in the form of a yellow oil.

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

Procedure: A mixture of 6-hydroxy-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one (0.50 g, 1.9 mmol), tert-butyl 6-bromohexanoate (1.25 g, 4.9 mmol) and potassium carbonate (0.54 g, 3.9 mmol) and DMF (10 ml) was stirred at room temperature for 24 hrs. The reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with water and dried. The solvent was evaporated. The obtained crystals were recrystallized from ethyl acetate-hexane to give the titled compound (0.75 g, 90%). extracted with ethyl acetate The extract was washed with water dried The solvent was evaporated The obtained crystals were recrystallized from ethyl acetate-hexane

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

Procedure: A solution of dimethylthiophosphite (4.56 g, 36.2 mmol), 6-bromohexanoic acid tert-butyl ester (100 g, 39.8 mmol) and triethylbenzylammonium chloride (0.82 g, 3.62 mmol) in dichloromethane (100 mL) was cooled on an ice bath and a solution of sodium hydroxide (14.5 g, 0.362 mol) in water (14.5 mL) was added slowly with vigorous stirring. The ice bath was removed and the mixture stirred for 3 days before being washed with water, dried (magnesium sulfate), and the solvent removed under reduced pressure to give crude 6-(dimethoxythiophosphoryl)hexanoic acid tert-butyl ester (8.00 g). The ice bath was removed before being washed with water dried (magnesium sulfate) the solvent removed under reduced pressure

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

Procedure: A solution of dimethylthiophosphite (4.56 g, 36.2 mmol), 6-bromohexanoic acid tert-butyl ester (100 g, 39.8 mmol) and triethylbenzylammonium chloride (0.82 g, 3.62 mmol) in dichloromethane (100 mL) was cooled on an ice bath and a solution of sodium hydroxide (14.5 g, 0.362 mol) in water (14.5 mL) was added slowly with vigorous stirring. The ice bath was removed and the mixture stirred for 3 days before being washed with water, dried (magnesium sulfate), and the solvent removed under reduced pressure to give crude 6-(dimethoxythiophosphoryl)hexanoic acid tert-butyl ester (8.00 g). The ice bath was removed before being washed with water dried (magnesium sulfate) the solvent removed under reduced pressure

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

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of methyl 6-(3′-hydroxyphenyl)-pyridine-2-carboxylate (7) (600 mg, 2.6 mmol, 1 eq.) and t-butyl 6-bromohexanoate (980 mg, 3.9 mmol, 1.5 eq.) in DMF (7 mL) was added K2CO3 (1.08 g, 7.8 mmol, 3 eq.). The mixture was stirred vigorously overnight at 60° C. and then concentrated in vacuo. The residue was dissolved in ethyl acetate, washed with NaH2PO4 buffer (pH 5, 1M) and brine, dried over Na2SO4 and concentrated in vacuo. The crude product was purified by flash chromatography on silica using ethyl acetate:hexanes eluant to provide 730 mg of 8. Yield 73%. MS m/z 400 [M+H]+ concentrated in vacuo The residue was dissolved in ethyl acetate washed with NaH2PO4 buffer (pH 5, 1M) and brine dried over Na2SO4 concentrated in vacuo The crude product was purified by flash chromatography on silica

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 8-hydroxyquinaldic acid methyl ester (406 mg, 2 mmol, 1 eq.) and t-butyl-6-bromohexanoate (754 mg, 3 mmol, 1.5 eq.) in DMF (5 mL) was added potassium carbonate (828 mg, 6 mmol, 3 eq.). The mixture was stirred vigorously for 3 h at 60° C., and then concentrated in vacuo. The residue was diluted with ethyl acetate, washed with NaH2PO4 buffer (pH 5, 1M) and brine, dried over Na2SO4 and concentrated in vacuo. Crude product was purified by flash chromatography on silica using ethyl acetate:hexanes gradient to provide 617 mg of 1. Yield 86%. MS m/z 374 (M+H)+ concentrated in vacuo The residue was diluted with ethyl acetate washed with NaH2PO4 buffer (pH 5, 1M) and brine dried over Na2SO4 concentrated in vacuo Crude product was purified by flash chromatography on silica