(6-BROMOHEXYLOXY)-TERT-BUTYLDIMETHYL-

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:

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

Procedure: To a stirred solution of 2,2′-bithiophene (10.0 g, 60.24 mmol) in dry THF (150 ml) was added n-butyllithium (2.5 M in hexanes, 20.0 ml, 50.0 mmol) dropwise at −78° C. under nitrogen. After complete addition, the mixture was allowed to warm to room temperature, with stirring, over 2 h, followed by the addition of 6-bromohexyloxy-tert-butyidimethylsilane (14.75 g, 50.0 mmol). The resultant mixture was stirred overnight at room temperature. The reaction was quenched with sat. aq. ammonium chloride, and the reaction mixture was extracted with ethyl acetate (3×70 ml). The combined organic extracts were washed with water, brine, and dried over magnesium sulphate. The solvent was removed under reduced pressure and the residue was purified by column chromatography (silica gel, petroleum/ethyl acetate from 100:0 to 20:1), to afford the product as a pale green oil (15.07 g, 79%). 1H NMR (300 MHz, CDCl3): δ (ppm) 7.08 (m, 1H, Ar—H), 7.03,(m, 1H, Ar—H), 6.92 (m, 2H, Ar—H), 6.61 (d, J=3.6 Hz, 1 H, Ar—H), 3.55 (t, J=6:2 Hz, 2H, OCH2), 3.34 (t, J=6.8 Hz, 2H, ArCH2), 1.25–1.85 (m, 8H, CH2), 0.86 (s, 9H, CH3), 0.01 (s, 6H, CH3); 13C NMR (75 MHz, CDCl3): δ (ppm).145.1 (quat.), 138.0 (quat.), 134.8 (quat.), 127.6 (CH), 124.7 (CH), 123.7 (CH), 123.4. (CH), 122.9 (CH), 63.0 (OCH2), 33.8 (CH2), 32.9 (CH2), 32.7 (CH2), 28.0 (CH2), 26.0 (CH3) 25.1 (CH2), 18.4 (quat.), −5.2 (CH3); MS (m/e): 380 (M+, 27%), 323 (63), 179 (100), 75 (37). After complete addition The reaction was quenched with sat. aq. ammonium chloride the reaction mixture was extracted with ethyl acetate (3×70 ml) The combined organic extracts were washed with water, brine dried over magnesium sulphate The solvent was removed under reduced pressure the residue was purified by column chromatography (silica gel, petroleum/ethyl acetate from 100:0 to 20:1)

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

Procedure: Add a solution of tert-butyllithium (26.35 mmol, 15.5 mL, 1.7 M in hexanes) dropwise to a solution of 4-(4-methoxyphenyl)-2-methylthiazole (6.15 g, 29.9 mmol) in degassed anhydrous tetrahydrofuran (THF) (100 mL) at −78° C. under nitrogen and stir the solution for 45 minutes. To this solution, add a solution of (6-bromohexyloxy)-tert-butyldimethylsilane (7.20 g, 24.4 mmol) over 5 min and stir the mixture for 2 hours. Warm the mixture to 0° C., dilute with NH4Cl (200 mL) and brine (250 mL) and extract with methylene chloride (3×150 mL). Dry the combined organic extracts over magnesium sulfate and remove the solvent under reduced pressure. Purify the crude product by flash column chromatography on silica gel, eluting with hexanes/ethyl acetate (5:1), to provide 2-[7-(tert-butyldimethylsilanyloxy)heptyl]-4-(4-methoxyphenyl)thiazole (6.27 g, 50%). stir the mixture for 2 hours extract with methylene chloride (3×150 mL) Dry the combined organic extracts over magnesium sulfate remove the solvent under reduced pressure Purify the crude product by flash column chromatography on silica gel eluting with hexanes/ethyl acetate (5:1)

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

Procedure: Add a solution of tert-butyllithium (26.35 mmol, 15.5 mL, 1.7 M in hexanes) dropwise to a solution of 4-(4-methoxyphenyl)-2-methylthiazole (6.15 g, 29.9 mmol) in degassed anhydrous tetrahydrofuran (THF) (100 mL) at −78° C. under nitrogen and stir the solution for 45 minutes. To this solution, add a solution of (6-bromohexyloxy)-tert-butyldimethylsilane (7.20 g, 24.4 mmol) over 5 min and stir the mixture for 2 hours. Warm the mixture to 0° C., dilute with NH4Cl (200 mL) and brine (250 mL) and extract with methylene chloride (3×150 mL). Dry the combined organic extracts over magnesium sulfate and remove the solvent under reduced pressure. Purify the crude product by flash column chromatography on silica gel, eluting with hexanes/ethyl acetate (5:1), to provide 2-[7-(tert-butyldimethylsilanyloxy)heptyl]-4-(4-methoxyphenyl)thiazole (6.27 g, 50%). stir the mixture for 2 hours extract with methylene chloride (3×150 mL) Dry the combined organic extracts over magnesium sulfate remove the solvent under reduced pressure Purify the crude product by flash column chromatography on silica gel eluting with hexanes/ethyl acetate (5:1)

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

Procedure: Add a solution of tert-butyldimethylsilyl chloride (5.0 g, 33.1 mmol) in dimethylforamide (DMF) (70 mL) dropwise over 15 minutes to a solution of 6-bromohexanol (5.0 g, 27.6 mmol) and imidazole (4.7 g, 69 mmol) in DMF (80 mL) at 0° C. under nitrogen protection and stir the mixture for another 3.5 hours. Dilute the mixture with water (400 mL) and extract with diethyl ether (3×150 mL). Dry the combined organic extracts over sodium sulfate and remove the solvent under reduced pressure. Purify the crude product by flash column chromatography on silica gel, eluting with ethyl acetate/hexanes (1:19), to provide (6-bromohexyloxy)-tert-butyldimethylsilane (8.05 g, 98%). extract with diethyl ether (3×150 mL) Dry the combined organic extracts over sodium sulfate remove the solvent under reduced pressure Purify the crude product by flash column chromatography on silica gel eluting with ethyl acetate/hexanes (1:19)

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

Procedure: Add a solution of tert-butyldimethylsilyl chloride (5.0 g, 33.1 mmol) in dimethylforamide (DMF) (70 mL) dropwise over 15 minutes to a solution of 6-bromohexanol (5.0 g, 27.6 mmol) and imidazole (4.7 g, 69 mmol) in DMF (80 mL) at 0° C. under nitrogen protection and stir the mixture for another 3.5 hours. Dilute the mixture with water (400 mL) and extract with diethyl ether (3×150 mL). Dry the combined organic extracts over sodium sulfate and remove the solvent under reduced pressure. Purify the crude product by flash column chromatography on silica gel, eluting with ethyl acetate/hexanes (1:19), to provide (6-bromohexyloxy)-tert-butyldimethylsilane (8.05 g, 98%). extract with diethyl ether (3×150 mL) Dry the combined organic extracts over sodium sulfate remove the solvent under reduced pressure Purify the crude product by flash column chromatography on silica gel eluting with ethyl acetate/hexanes (1:19)

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

Procedure: A solution of 500 mg (2.07 mmol) of 2-acetylphenothiazine in 8 mL of tetrahydrofuran is cooled to -78° C. and 4.14 mL (2.07 mmol) of a 0.5M solution of potassium bis(trimethylsilyl)amide in toluene is added. After five minutes, a solution of [(6-bromohexyl)oxy]-(1,1-dimethylethyl)dimethyl silane in 2 mL of tetrahydrofuran is added and the reaction is allowed to warm to room temperature. The mixture is diluted with 25 mL of ethyl acetate and washed with 10% sodium bisulfate solution and saturated sodium chloride solution, then dried over magnesium sulfate and concentrated in vacuo to give a dark colored residue. Flash chromatography (3:1 hexane/ethyl acetate) provides 318 mg (33%) of 1-[10-[6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]hexyl]-10H-phenothiazin-2-yl]ethanone as a dark colored oil. The 1H NMR (300 MHz, CDCl3) is consistent with the desired product; IR (neat) 1680, 1600, 1560 cm-1 ; MS m/e calculated for C26H37NO2SSi: 455.2314, found 455.2312. washed with 10% sodium bisulfate solution and saturated sodium chloride solution dried over magnesium sulfate concentrated in vacuo to give a dark colored residue

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

Procedure: A solution of 500 mg (2.07 mmol) of 2-acetylphenothiazine in 8 mL of tetrahydrofuran is cooled to -78° C. and 4.14 mL (2.07 mmol) of a 0.5M solution of potassium bis(trimethylsilyl)amide in toluene is added. After five minutes, a solution of [(6-bromohexyl)oxy]-(1,1-dimethylethyl)dimethyl silane in 2 mL of tetrahydrofuran is added and the reaction is allowed to warm to room temperature. The mixture is diluted with 25 mL of ethyl acetate and washed with 10% sodium bisulfate solution and saturated sodium chloride solution, then dried over magnesium sulfate and concentrated in vacuo to give a dark colored residue. Flash chromatography (3:1 hexane/ethyl acetate) provides 318 mg (33%) of 1-[10-[6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]hexyl]-10H-phenothiazin-2-yl]ethanone as a dark colored oil. The 1H NMR (300 MHz, CDCl3) is consistent with the desired product; IR (neat) 1680, 1600, 1560 cm-1 ; MS m/e calculated for C26H37NO2SSi: 455.2314, found 455.2312. washed with 10% sodium bisulfate solution and saturated sodium chloride solution dried over magnesium sulfate concentrated in vacuo to give a dark colored residue

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Sodium cyanide (1.2 g) dissolved in dimethylsulphoxide was heated at 90° C. for 30 min. Solid 1-t-butyldimethylsilyloxy-6-bromohexane (5.8 g, compound X1) prepared according to the method previously described (ref. 37), then was added into the sodium cyanide solution. After heating at 120-130° C. for 20-180 min, the reaction mixture was poured into ice-cold water and the aqueous layer was extracted with ether, washed with brine, dried and concentrated. The product was distilled at 0.5 Torr and 107° C. to give a colorless oil. High resolution mass spectrometer for C12 H24 O N Si: calculated 226.1627, found 226.1624. After heating at 120-130° C. for 20-180 min the reaction mixture was poured into ice-cold water the aqueous layer was extracted with ether washed with brine dried concentrated The product was distilled at 0.5 Torr and 107° C. to give a colorless oil