tert-butyl-(furan-2-ylmethoxy)-dimethylsilane

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

Procedure: A solution of 2-(t-butyldimethylsilyloxymethyl)furan (5 g, 0.023 mol) in THF (48 mL) was dried over 3 {acute over (Å)} molecular sieves. After the sieves were removed, an additional 10 mL THF was added along with TMEDA (3.47 mL, 0.023 mol), and the solution was cooled to 0° C. in an ice bath. A solution of BuLi (10.1 mL of 2.5M in hexane, 0.025 mol) was added dropwise over 25 minutes. The mixture was allowed to stir for 1 hour. 1-chloro-3-iodopropane (5.64 g, 0.028 mol) was injected rapidly. After 2 hours TLC indicated completion. The solvent was evaporated, and the material was partitioned between ether (100 mL) and 5% citric acid (100 mL). The ether layer was washed with water (50 mL) and then brine (50 mL). The ether solution was dried with sodium sulfate, filtered, and evaporated. The resulting material was flashed on silica using 20/1 heptane/EtOAc. Appropriate fraction were combined and evaporated to yield 4.9 g (75% yield). TLC: Rf 0.6 (Heptane/EtOAc 5/1) 1H NMR: (CDCl3) δ 0.00 (s, 6H), 0.83 (s, 9H), 2.01 (p, 2H), 2.71 (t, 2H), 3.48 (t, 2H), 4.51 (s, 2H), 5.88 (d, 1H), 6.04 (d, 1H) After the sieves were removed After 2 hours TLC indicated completion The solvent was evaporated the material was partitioned between ether (100 mL) and 5% citric acid (100 mL) The ether layer was washed with water (50 mL) The ether solution was dried with sodium sulfate filtered evaporated evaporated to yield 4.9 g (75% yield)

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

Procedure: To a 1 liter flask containing dimethyl formamide (150 mL) was added furfuryl alcohol (17.7 mL, 0.20 mol), t-butyldimethylsilyl chloride (33.7 g, 0.22 mole), and imidazole (15.3 g, 0.22 mol). After 22 hours stirring at RT, the reaction was filtered and the volatiles removed in vacuo. The resulting material was partitioned between diethyl ether (500 mL) and a saturated aqueous solution of citric acid (100 mL). Additionally, the ether layer was washed 2×100 mL sat. citric acid. The combined aqueous layers were back extracted 1×50 mL ether. The combined organic layers were washed 1×100 mL water followed by 1×100 mL brine. The ether layer was dried over anhydrous sodium sulfate, filtered, and evaporated to yield 28.1 g (65% yield). 1H NMR: (DMSO-d6) δ 0.01 (s, 6H), 0.82 (s, 9H), 4.55 (s, 2H), 6.29 (d, 1H), 6.36 (dd, 1H), 7.58 (d, 1H) the reaction was filtered the volatiles removed in vacuo The resulting material was partitioned between diethyl ether (500 mL) Additionally, the ether layer was washed 2×100 mL sat. citric acid The combined aqueous layers were back extracted 1×50 mL ether The combined organic layers were washed 1×100 mL water The ether layer was dried over anhydrous sodium sulfate filtered evaporated to yield 28.1 g (65% yield)

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of m-bromoaniline (6.88 g; 0.04M) in 42.2 g (0.2M) of 2-(t-butyldimethylsilyloxymethyl)furan at 0° was added isoamylnitrite (10.75 mL: 0.08M) dropwise over a period of 0.5 hr. The resulting mixture was then heated 16 hours at 50° C. The reaction mixture was cooled and diluted with 150 mL of ether and washed with 2×100 mL of ice cold water. The organic phase was dried over anhydrous magnesium sulfate, and the residue was distilled after filtering through 50 G of silica gel bed, to give 26% of the desired 2-(3'-bromophenyl)-5-(t-butyldimethylsilyloxymethyl)furan as a colorless liquid boiling at 163°-7°/~0.5 mm. The reaction mixture was cooled washed with 2×100 mL of ice cold water The organic phase was dried over anhydrous magnesium sulfate the residue was distilled after filtering through 50 G of silica gel bed

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

Procedure: A solution of 2-(t-butyldimethylsilyloxymethyl)furan (5 g, 0.023 mol) in THF (48 mL) was dried over 3 {acute over (Å)} molecular sieves. After the sieves were removed, an additional 10 mL THF was added along with TMEDA (3.47 mL, 0.023 mol), and the solution was cooled to 0° C. in an ice bath. A solution of BuLi (10.1 mL of 2.5M in hexane, 0.025 mol) was added dropwise over 25 minutes. The mixture was allowed to stir for 1 hour. 1-chloro-3-iodopropane (5.64 g, 0.028 mol) was injected rapidly. After 2 hours TLC indicated completion. The solvent was evaporated, and the material was partitioned between ether (100 mL) and 5% citric acid (100 mL). The ether layer was washed with water (50 mL) and then brine (50 mL). The ether solution was dried with sodium sulfate, filtered, and evaporated. The resulting material was flashed on silica using 20/1 heptane/EtOAc. Appropriate fraction were combined and evaporated to yield 4.9 g (75% yield). TLC: Rf 0.6 (Heptane/EtOAc 5/1) 1H NMR: (CDCl3) δ 0.00 (s, 6H), 0.83 (s, 9H), 2.01 (p, 2H), 2.71 (t, 2H), 3.48 (t, 2H), 4.51 (s, 2H), 5.88 (d, 1H), 6.04 (d, 1H) After the sieves were removed After 2 hours TLC indicated completion The solvent was evaporated the material was partitioned between ether (100 mL) and 5% citric acid (100 mL) The ether layer was washed with water (50 mL) The ether solution was dried with sodium sulfate filtered evaporated evaporated to yield 4.9 g (75% yield)

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

Procedure: To a 1 liter flask containing dimethyl formamide (150 mL) was added furfuryl alcohol (17.7 mL, 0.20 mol), t-butyldimethylsilyl chloride (33.7 g, 0.22 mole), and imidazole (15.3 g, 0.22 mol). After 22 hours stirring at RT, the reaction was filtered and the volatiles removed in vacuo. The resulting material was partitioned between diethyl ether (500 mL) and a saturated aqueous solution of citric acid (100 mL). Additionally, the ether layer was washed 2×100 mL sat. citric acid. The combined aqueous layers were back extracted 1×50 mL ether. The combined organic layers were washed 1×100 mL water followed by 1×100 mL brine. The ether layer was dried over anhydrous sodium sulfate, filtered, and evaporated to yield 28.1 g (65% yield). 1H NMR: (DMSO-d6) δ 0.01 (s, 6H), 0.82 (s, 9H), 4.55 (s, 2H), 6.29 (d, 1H), 6.36 (dd, 1H), 7.58 (d, 1H) the reaction was filtered the volatiles removed in vacuo The resulting material was partitioned between diethyl ether (500 mL) Additionally, the ether layer was washed 2×100 mL sat. citric acid The combined aqueous layers were back extracted 1×50 mL ether The combined organic layers were washed 1×100 mL water The ether layer was dried over anhydrous sodium sulfate filtered evaporated to yield 28.1 g (65% yield)

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

Procedure: To a 1 liter flask containing dimethyl formamide (150 mL) was added furfuryl alcohol (17.7 mL, 0.20 mol), t-butyldimethylsilyl chloride (33.7 g, 0.22 mole), and imidazole (15.3 g, 0.22 mol). After 22 hours stirring at RT, the reaction was filtered and the volatiles removed in vacuo. The resulting material was partitioned between diethyl ether (500 mL) and a saturated aqueous solution of citric acid (100 mL). Additionally, the ether layer was washed 2×100 mL sat. citric acid. The combined aqueous layers were back extracted 1×50 mL ether. The combined organic layers were washed 1×100 mL water followed by 1×100 mL brine. The ether layer was dried over anhydrous sodium sulfate, filtered, and evaporated to yield 28.1 g (65% yield). 1H NMR: (DMSO-d6) δ 0.01 (s, 6H), 0.82 (s, 9H), 4.55 (s, 2H), 6.29 (d, 1H), 6.36 (dd, 1H), 7.58 (d, 1H) the reaction was filtered the volatiles removed in vacuo The resulting material was partitioned between diethyl ether (500 mL) Additionally, the ether layer was washed 2×100 mL sat. citric acid The combined aqueous layers were back extracted 1×50 mL ether The combined organic layers were washed 1×100 mL water The ether layer was dried over anhydrous sodium sulfate filtered evaporated to yield 28.1 g (65% yield)

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of m-bromoaniline (6.88 g; 0.04M) in 42.2 g (0.2M) of 2-(t-butyldimethylsilyloxymethyl)furan at 0° was added isoamylnitrite (10.75 mL: 0.08M) dropwise over a period of 0.5 hr. The resulting mixture was then heated 16 hours at 50° C. The reaction mixture was cooled and diluted with 150 mL of ether and washed with 2×100 mL of ice cold water. The organic phase was dried over anhydrous magnesium sulfate, and the residue was distilled after filtering through 50 G of silica gel bed, to give 26% of the desired 2-(3'-bromophenyl)-5-(t-butyldimethylsilyloxymethyl)furan as a colorless liquid boiling at 163°-7°/~0.5 mm. The reaction mixture was cooled washed with 2×100 mL of ice cold water The organic phase was dried over anhydrous magnesium sulfate the residue was distilled after filtering through 50 G of silica gel bed

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of m-bromoaniline (6.88 g; 0.04M) in 42.2 g (0.2M) of 2-(t-butyldimethylsilyloxymethyl)furan at 0° was added isoamylnitrite (10.75 mL: 0.08M) dropwise over a period of 0.5 hr. The resulting mixture was then heated 16 hours at 50° C. The reaction mixture was cooled and diluted with 150 mL of ether and washed with 2×100 mL of ice cold water. The organic phase was dried over anhydrous magnesium sulfate, and the residue was distilled after filtering through 50G of silica gel bed, to give 26% of the desired 2-(3'-bromophenyl)-5-(t-butyldimethylsilyloxymethyl)furan as a colorless liquid boiling at 163°-7°/~0.5 mm. The reaction mixture was cooled washed with 2×100 mL of ice cold water The organic phase was dried over anhydrous magnesium sulfate the residue was distilled after filtering through 50G of silica gel bed

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of m-bromoaniline (6.88 g; 0.04M) in 42.2 g (0.2M) of 2-(t-butyldimethylsilyloxymethyl)furan at 0° was added isoamylnitrite (10.75 mL: 0.08M) dropwise over a period of 0.5 hr. The resulting mixture was then heated 16 hours at 50° C. The reaction mixture was cooled and diluted with 150 mL of ether and washed with 2×100 mL of ice cold water. The organic phase was dried over anhydrous magnesium sulfate, and the residue was distilled after filtering through 50 G of silica gel bed, to give 26% of the desired 2-(3'-bromophenyl)-5-(t-butyldimethylsilyloxymethyl)-furan as a colorless liquid boiling at 163°-7°/~0.5 mm. The reaction mixture was cooled washed with 2×100 mL of ice cold water The organic phase was dried over anhydrous magnesium sulfate the residue was distilled after filtering through 50 G of silica gel bed

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

Procedure: A solution of 2-(t-butyldimethylsilyloxymethyl)furan (5 g, 0.023 mol) in THF (48 mL) was dried over 3 Å molecular sieves. After the sieves were removed, an additional 10 mL THF was added along with TMEDA (3.47 mL, 0.023 mol), and the solution was cooled to 0° C. in an ice bath. A solution of BuLi (10.1 mL of 2.5M in hexane, 0.025 mol) was added dropwise over 25 minutes. The mixture was allowed to stir for 1 hour. 1-chloro-3-iodopropane (5.64 g, 0.028 mol) was injected rapidly. After 2 hours TLC indicated completion. The solvent was evaporated, and the material was partitioned between ether (100 mL) and 5% citric acid (100 mL). The ether layer was washed with water (50 mL) and then brine (50 mL). The ether solution was dried with sodium sulfate, filtered, and evaporated. The resulting material was flashed on silica using 20/1 heptane/EtOAc. Appropriate fraction were combined and evaporated to yield 4.9 g (75% yield). TLC: Rf 0.6 (Heptane/EtOAc 5/1) 1H NMR: (CDCl3) δ 0.00 (s, 6H), 0.83 (s, 9H), 2.01 (p, 2H), 2.71 (t, 2H), 3.48 (t, 2H), 4.51 (s, 2H), 5.88 (d, 1H), 6.04 (d, 1H) After the sieves were removed After 2 hours TLC indicated completion The solvent was evaporated the material was partitioned between ether (100 mL) and 5% citric acid (100 mL) The ether layer was washed with water (50 mL) The ether solution was dried with sodium sulfate filtered evaporated evaporated to yield 4.9 g (75% yield)

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

Procedure: To a 1 liter flask containing dimethyl formamide (150 mL) was added furfuryl alcohol (17.7 mL, 0.20 mol), t-butyldimethylsilyl chloride (33.7 g, 0.22 mole), and imidazole (15.3 g, 0.22 mol). After 22 hours stirring at RT, the reaction was filtered and the volatiles removed in vacuo. The resulting material was partitioned between diethyl ether (500 mL) and a saturated aqueous solution of citric acid (100 mL). Additionally, the ether layer was washed 2×100 mL sat. citric acid. The combined aqueous layers were back extracted 1×50 mL ether. The combined organic layers were washed 1×100 mL water followed by 1×100 mL brine. The ether layer was dried over anhydrous sodium sulfate, filtered, and evaporated to yield 28.1 g (65% yield). 1H NMR: (DMSO-d6) δ 0.01 (s, 6H), 0.82 (s, 9H), 4.55 (s, 2H), 6.29 (d, 1H), 6.36 (dd, 1H), 7.58 (d, 1H) the reaction was filtered the volatiles removed in vacuo The resulting material was partitioned between diethyl ether (500 mL) Additionally, the ether layer was washed 2×100 mL sat. citric acid The combined aqueous layers were back extracted 1×50 mL ether The combined organic layers were washed 1×100 mL water The ether layer was dried over anhydrous sodium sulfate filtered evaporated to yield 28.1 g (65% yield)

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of m-bromoaniline (6.88 g; 0.04M) in 42.2 g (0.2M) of 2-(t-butyldimethylsilyloxymethyl)furan at 0° was added isoamylnitrite (10.75 mL: 0.08M) dropwise over a period of 0.5 hr. The resulting mixture was then heated 16 hours at 50° C. The reaction mixture was cooled and diluted with 150 mL of ether and washed with 2×100 mL of ice cold water. The organic phase was dried over anhydrous magnesium sulfate, and the residue was distilled after filtering through 50 G of silica gel bed, to give 26% of the desired 2-(3'-bromophenyl)-5-(t-butyldimethylsilyloxymethyl)furan as a colorless liquid boiling at 163°-7°/~0.5 mm. The reaction mixture was cooled washed with 2×100 mL of ice cold water The organic phase was dried over anhydrous magnesium sulfate the residue was distilled after filtering through 50 G of silica gel bed