1,1,1-trifluoro-2-(trifluoromethyl)pentane-2,4-diol

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

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

Procedure: The title compound was prepared in the same fashion as the above described methacrylate using 142 g (0.63 mol) of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol, 793 mL (1.27 mol) of n-butyllithium (1.6M in hexane) and 73 g (0.69 mol) of methacryloyl chloride to yield, after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil. to yield after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil

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

Procedure: N-butyllithium (1600 ml) (2.56 mol, 1.6M solution in hexanes) was added to a 3-L, three-necked round bottomed flask equipped with an overhead stirrer, a digital thermometer, a 500-mL capacity constant-pressure dropping funnel and a nitrogen inlet. The dropping funnel was charged with a solution of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol (289 g, 1.28 mol) in anhydrous THF (250 ml). The flask was cooled in ice and the THF solution was slowly added over about 2 hours, while maintaining a temperature below 10° C. Once the addition was complete, the dropping funnel was recharged with a solution of norbornene-5-carbonylchloride (201 g, 1.28 mol) in anhydrous THF (250 ml), which was then slowly added over about 1.5 hours, while maintaining a temperature below 10° C. The solution was allowed to reach room temperature with stirring overnight. The resulting suspension was transferred to a 4-L separatory funnel and washed once with water (1 L). The organic layer was separated and the aqueous wash was adjusted to pH 6 (litmus) with concentrated HCl and extracted twice with ether (1 L). The combined organic solutions were washed once with water and once with brine and dried over anhydrous magnesium sulfate. The suspension was filtered, the solvent removed on a rotary evaporator and the resulting oil distilled twice at 120° C. and 0.5 mm Hg to yield 387 g of the title compound as an oil. equipped with an overhead stirrer The flask was cooled in ice while maintaining a temperature below 10° C Once the addition was then slowly added over about 1.5 hours while maintaining a temperature below 10° C to reach room temperature The resulting suspension was transferred to a 4-L separatory funnel washed once with water (1 L) The organic layer was separated the aqueous wash extracted twice with ether (1 L) The combined organic solutions were washed once with water and once with brine dried over anhydrous magnesium sulfate The suspension was filtered the solvent removed on a rotary evaporator the resulting oil distilled twice at 120° C.

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

Procedure: N-butyllithium (1600 ml) (2.56 mol, 1.6M solution in hexanes) was added to a 3-L, three-necked round bottomed flask equipped with an overhead stirrer, a digital thermometer, a 500-mL capacity constant-pressure dropping funnel and a nitrogen inlet. The dropping funnel was charged with a solution of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol (289 g, 1.28 mol) in anhydrous THF (250 ml). The flask was cooled in ice and the THF solution was slowly added over about 2 hours, while maintaining a temperature below 10° C. Once the addition was complete, the dropping funnel was recharged with a solution of norbornene-5-carbonylchloride (201 g, 1.28 mol) in anhydrous THF (250 ml), which was then slowly added over about 1.5 hours, while maintaining a temperature below 10° C. The solution was allowed to reach room temperature with stirring overnight. The resulting suspension was transferred to a 4-L separatory funnel and washed once with water (1 L). The organic layer was separated and the aqueous wash was adjusted to pH 6 (litmus) with concentrated HCl and extracted twice with ether (1 L). The combined organic solutions were washed once with water and once with brine and dried over anhydrous magnesium sulfate. The suspension was filtered, the solvent removed on a rotary evaporator and the resulting oil distilled twice at 120° C. and 0.5 mm Hg to yield 387 g of the title compound as an oil. equipped with an overhead stirrer The flask was cooled in ice while maintaining a temperature below 10° C Once the addition was then slowly added over about 1.5 hours while maintaining a temperature below 10° C to reach room temperature The resulting suspension was transferred to a 4-L separatory funnel washed once with water (1 L) The organic layer was separated the aqueous wash extracted twice with ether (1 L) The combined organic solutions were washed once with water and once with brine dried over anhydrous magnesium sulfate The suspension was filtered the solvent removed on a rotary evaporator the resulting oil distilled twice at 120° C.

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

Procedure: The title compound was prepared in the same fashion as the above described methacrylate using 142 g (0.63 mol) of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol, 793 mL (1.27 mol) of n-butyllithium (1.6 M in hexane) and 73 g (0.69 mol) of methacryloyl chloride to yield, after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil. to yield after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil

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

Procedure: The title compound was prepared in the same fashion as the above described methacrylate using 142 g (0.63 mol) of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol, 793 mL (1.27 mol) of n-butyllithium (1.6 M in hexane) and 73 g (0.69 mol) of methacryloyl chloride to yield, after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil. to yield after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil

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

Procedure: The title compound was prepared in the same fashion as the above described methacrylate using 142 g (0.63 mol) of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol, 793 mL (1.27 mol) of n-butyllithium (1.6M in hexane) and 73 g (0.69 mol) of methacryloyl chloride to yield, after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil. to yield after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil

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

Procedure: The title compound was prepared in the same fashion as the above described methacrylate using 142 g (0.63 mol) of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol, 793 mL (1.27 mol) of n-butyllithium (1.6M in hexane) and 73 g (0.69 mol) of methacryloyl chloride to yield, after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil. to yield after distillation at 67° C. at 1.0 mm Hg, 142 g (76%) of the 2° methacrylate as a clear, colorless oil

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

Procedure: N-butyllithium (1600 ml) (2.56 mol, 1.6M solution in hexanes) was added to a 3-L, three-necked round bottomed flask equipped with an overhead stirrer, a digital thermometer, a 500-mL capacity constant-pressure dropping funnel and a nitrogen inlet. The dropping funnel was charged with a solution of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol (289 g, 1.28 mol) in anhydrous THF (250 ml). The flask was cooled in ice and the THF solution was slowly added over about 2 hours, while maintaining a temperature below 10° C. Once the addition was complete, the dropping funnel was recharged with a solution of norbornene-5-carbonylchloride (201 g, 1.28 mol) in anhydrous THF (250 ml), which was then slowly added over about 1.5 hours, while maintaining a temperature below 10° C. The solution was allowed to reach room temperature with stirring overnight. The resulting suspension was transferred to a 4-L separatory funnel and washed once with water (1 L). The organic layer was separated and the aqueous wash was adjusted to pH 6 (litmus) with concentrated HCl and extracted twice with ether (1 L). The combined organic solutions were washed once with water and once with brine and dried over anhydrous magnesium sulfate. The suspension was filtered, the solvent removed on a rotary evaporator and the resulting oil distilled twice at 120° C. and 0.5 mm Hg to yield 387 g of the title compound as an oil. equipped with an overhead stirrer The flask was cooled in ice while maintaining a temperature below 10° C Once the addition was then slowly added over about 1.5 hours while maintaining a temperature below 10° C to reach room temperature The resulting suspension was transferred to a 4-L separatory funnel washed once with water (1 L) The organic layer was separated the aqueous wash extracted twice with ether (1 L) The combined organic solutions were washed once with water and once with brine dried over anhydrous magnesium sulfate The suspension was filtered the solvent removed on a rotary evaporator the resulting oil distilled twice at 120° C.

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

Procedure: N-butyllithium (1600 ml) (2.56 mol, 1.6M solution in hexanes) was added to a 3-L, three-necked round bottomed flask equipped with an overhead stirrer, a digital thermometer, a 500-mL capacity constant-pressure dropping funnel and a nitrogen inlet. The dropping funnel was charged with a solution of 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol (289 g, 1.28 mol) in anhydrous THF (250 ml). The flask was cooled in ice and the THF solution was slowly added over about 2 hours, while maintaining a temperature below 10° C. Once the addition was complete, the dropping funnel was recharged with a solution of norbornene-5-carbonylchloride (201 g, 1.28 mol) in anhydrous THF (250 ml), which was then slowly added over about 1.5 hours, while maintaining a temperature below 10° C. The solution was allowed to reach room temperature with stirring overnight. The resulting suspension was transferred to a 4-L separatory funnel and washed once with water (1 L). The organic layer was separated and the aqueous wash was adjusted to pH 6 (litmus) with concentrated HCl and extracted twice with ether (1 L). The combined organic solutions were washed once with water and once with brine and dried over anhydrous magnesium sulfate. The suspension was filtered, the solvent removed on a rotary evaporator and the resulting oil distilled twice at 120° C. and 0.5 mm Hg to yield 387 g of the title compound as an oil. equipped with an overhead stirrer The flask was cooled in ice while maintaining a temperature below 10° C Once the addition was then slowly added over about 1.5 hours while maintaining a temperature below 10° C to reach room temperature The resulting suspension was transferred to a 4-L separatory funnel washed once with water (1 L) The organic layer was separated the aqueous wash extracted twice with ether (1 L) The combined organic solutions were washed once with water and once with brine dried over anhydrous magnesium sulfate The suspension was filtered the solvent removed on a rotary evaporator the resulting oil distilled twice at 120° C.

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

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

Procedure: Preparation of 1,1,1-trifluoro-2-trifluoromethyl-2,5-pentanediol and 1,1,1-trifluoro-2 -trifluoromethyl-2,4-pentanediol: To a 3-necked, 3-L round bottomed flask equipped with an overhead stirrer, digital thermometer and a 1-L constant-pressure addition funnel with a nitrogen inlet was added 974 mL (1.95 mol) of borane-dimethylsulfide complex (2.0 M in tetrahydrofuran). The addition funnel was charged with a solution of 353 g (1.7 mol) of 1,1,1-trifluoro-2-trifluoromethyl-4-penten-2-ol in 400 mL of anhydrous tetrahydrofuran. The flask was cooled and the olefin was added slowly with stirring while maintaining a temperature below 15° C. The mixture was stirred at room temperature for two days after which time it was recooled and 750 mL (2.25 mol) of 3M NaOH was added carefully. The reaction mixture was reduced in volume on a rotary evaporator and subsequently co-evaporated with two 500 mL portions of diethyl ether. The resulting heavy oil was taken up in 300 mL of THF and the solution transferred to a 1-L 3-necked round-bottomed flask equipped with a 250-mL addition funnel, a digital thermometer and a magnetic stir bar. The addition funnel was charged with 250 mL of 30% hydrogen peroxide. The flask was cooled and the hydrogen peroxide added slowly with stirring. After stirring overnight at room temperature, the solution was diluted with 1 L of diethyl ether and adjusted to pH 6 (wet litmus) with 5% HCl. The ether layer was separated and the aqueous layer was extracted with 2×500 mL of ether. The combined organic phases were washed with 2×500 mL of saturated ammonium chloride and brine, dried over MgSO4 and evaporated to a crude yield of 379 g of a 45:55 (2°:1°) mixture of the two diols. The diols were separated by distillation through a 12″ Vigreux, bp 47° C. at 1.0 mm Hg (2° alcohol) and bp 55° C. at 1.0 mm Hg (1° alcohol). The 1° alcohol is a viscous oil while the 2° alcohol is a low melting solid. The flask was cooled while maintaining a temperature below 15° C The mixture was stirred at room temperature for two days after which time it The reaction mixture was reduced in volume on a rotary evaporator and subsequently co-evaporated with two 500 mL portions of diethyl ether the solution transferred to a 1-L 3-necked round-bottomed flask equipped with a 250-mL addition funnel The addition funnel was charged with 250 mL of 30% hydrogen peroxide The flask was cooled the hydrogen peroxide added slowly with stirring After stirring overnight at room temperature the solution was diluted with 1 L of diethyl ether The ether layer was separated the aqueous layer was extracted with 2×500 mL of ether The combined organic phases were washed with 2×500 mL of saturated ammonium chloride and brine dried over MgSO4 evaporated to a crude yield of 379 g of a 45:55 (2°:1°) mixture of the two diols The diols were separated by distillation through a 12″ Vigreux, bp 47° C. at 1.0 mm Hg (2° alcohol) and bp 55° C. at 1.0 mm Hg (1° alcohol) The 1° alcohol while the 2° alcohol