2,2-dimethylheptan-3-ol

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

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

Procedure: 2,2-Dimethyl-heptan-3-ol (0.23 mol) was dissolved in 350 mL of CH2Cl2 in a 500 mL round bottom flask with a magnetic stirbar. The flask was partially cooled with ice. 76.6 g (0.355 mol) of pyridinium chlorochromate was added, while vigorously stirring. The reaction turned black and warmed up slightly. The reaction mixture was stirred at room temperature for 24 hours. The solution was decanted away from the black sludge, which was rinsed with hexane. The organic extracts were combined and chromatographed directly on silica gel. (Note: only silica has been found to trap and remove the reduced non-reacted chromium compounds). The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction to yield 29.19 g of product at 88% yield. 1H NMR (CDCl3, 500 MHz) δ (ppm): 2.48 (t, 2H), 1.54 (m, 2H), 1.28 (m, 2H), 1.13 (s, 9H), 0.90 (m, 3H). The flask was partially cooled with ice warmed up slightly The reaction mixture was stirred at room temperature for 24 hours The solution was decanted away from the black sludge, which was rinsed with hexane chromatographed directly on silica gel (Note: only silica has been found to trap remove the reduced non-reacted chromium compounds) The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction

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

Procedure: 2,2-Dimethyl-heptan-3-ol (0.23 mol) was dissolved in 350 mL of CH2Cl2 in a 500 mL round bottom flask with a magnetic stirbar. The flask was partially cooled with ice. 76.6 g (0.355 mol) of pyridinium chlorochromate was added, while vigorously stirring. The reaction turned black and warmed up slightly. The reaction mixture was stirred at room temperature for 24 hours. The solution was decanted away from the black sludge, which was rinsed with hexane. The organic extracts were combined and chromatographed directly on silica gel. (Note: only silica has been found to trap and remove the reduced non-reacted chromium compounds). The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction to yield 29.19 g of product at 88% yield. 1H NMR (CDCl3, 500 MHz) δ (ppm): 2.48 (t, 2H), 1.54 (m, 2H), 1.28 (m, 2H), 1.13 (s, 9H), 0.90 (m, 3H). The flask was partially cooled with ice warmed up slightly The reaction mixture was stirred at room temperature for 24 hours The solution was decanted away from the black sludge, which was rinsed with hexane chromatographed directly on silica gel (Note: only silica has been found to trap remove the reduced non-reacted chromium compounds) The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction

Conditions: temp:-65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20 g (0.232 mol) of pivaldehyde dissolved in 600 mL of THF was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar, thermometer and rubber stopper. The vessel was maintained under N2. The reaction mixture was cooled to −65° C. in a dry ice/acetone bath. 112 mL (0.279 mol) of a 2.5 M BuLi solution in hexane was slowly added in 5 mL portions with a 20 mL glass syringe, maintaining the temperature below −55° C. The reaction was stirred at −60° C. for one hour, then allowed to warm to −5° C. over one hour. The reaction was cooled again to −60° C. and slowly quenched with NH4Cl/H2O solution, maintaining the temperature below −50° C. 100 mL of water were added and the reaction was allowed to warm to room temperature. The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil was observed. The product was extracted with ethyl ether, and the ether was dried and evaporated carefully to yield 31.0 g of 2,2-dimethyl-heptan-3-ol that was used directly in a subsequent oxidation reaction. 1H NMR (CDCl3, 500 MHz) δ (ppm): 3.2 (m, 1H), 1.2-1.7 (m, 3H), 0.93 (m, 3H), 0.89 (s, 9H). was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar The vessel was maintained under N2 maintaining the temperature below −55° C to warm to −5° C. over one hour The reaction was cooled again to −60° C. slowly quenched with NH4Cl/H2O solution maintaining the temperature below −50° C 100 mL of water were added to warm to room temperature The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil The product was extracted with ethyl ether the ether was dried evaporated carefully

Conditions: temp:-65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20 g (0.232 mol) of pivaldehyde dissolved in 600 mL of THF was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar, thermometer and rubber stopper. The vessel was maintained under N2. The reaction mixture was cooled to −65° C. in a dry ice/acetone bath. 112 mL (0.279 mol) of a 2.5 M BuLi solution in hexane was slowly added in 5 mL portions with a 20 mL glass syringe, maintaining the temperature below −55° C. The reaction was stirred at −60° C. for one hour, then allowed to warm to −5° C. over one hour. The reaction was cooled again to −60° C. and slowly quenched with NH4Cl/H2O solution, maintaining the temperature below −50° C. 100 mL of water were added and the reaction was allowed to warm to room temperature. The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil was observed. The product was extracted with ethyl ether, and the ether was dried and evaporated carefully to yield 31.0 g of 2,2-dimethyl-heptan-3-ol that was used directly in a subsequent oxidation reaction. 1H NMR (CDCl3, 500 MHz) δ (ppm): 3.2 (m, 1H), 1.2-1.7 (m, 3H), 0.93 (m, 3H), 0.89 (s, 9H). was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar The vessel was maintained under N2 maintaining the temperature below −55° C to warm to −5° C. over one hour The reaction was cooled again to −60° C. slowly quenched with NH4Cl/H2O solution maintaining the temperature below −50° C 100 mL of water were added to warm to room temperature The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil The product was extracted with ethyl ether the ether was dried evaporated carefully

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

Procedure: 2,2-Dimethyl-heptan-3-ol (0.23 mol) was dissolved in 350 mL of CH2Cl2 in a 500 mL round bottom flask with a magnetic stirbar. The flask was partially cooled with ice. 76.6 g (0.355 mol) of pyridinium chlorochromate was added, while vigorously stirring. The reaction turned black and warmed up slightly. The reaction mixture was stirred at room temperature for 24 hours. The solution was decanted away from the black sludge, which was rinsed with hexane. The organic extracts were combined and chromatographed directly on silica gel. (Note: only silica has been found to trap and remove the reduced non-reacted chromium compounds). The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction to yield 29.19 g of product at 88% yield. 1H NMR (CDCl3, 500 MHz) δ (ppm): 2.48 (t, 2H), 1.54 (m, 2H), 1.28 (m, 2H), 1.13 (s, 9H), 0.90 (m, 3H). The flask was partially cooled with ice warmed up slightly The reaction mixture was stirred at room temperature for 24 hours The solution was decanted away from the black sludge, which was rinsed with hexane chromatographed directly on silica gel (Note: only silica has been found to trap remove the reduced non-reacted chromium compounds) The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction

Conditions: temp:-65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20 g (0.232 mol) of pivaldehyde dissolved in 600 mL of THF was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar, thermometer and rubber stopper. The vessel was maintained under N2. The reaction mixture was cooled to −65° C. in a dry ice/acetone bath. 112 mL (0.279 mol) of a 2.5 M BuLi solution in hexane was slowly added in 5 mL portions with a 20 mL glass syringe, maintaining the temperature below −55° C. The reaction was stirred at −60° C. for one hour, then allowed to warm to −5° C. over one hour. The reaction was cooled again to −60° C. and slowly quenched with NH4Cl/H2O solution, maintaining the temperature below −50° C. 100 mL of water were added and the reaction was allowed to warm to room temperature. The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil was observed. The product was extracted with ethyl ether, and the ether was dried and evaporated carefully to yield 31.0 g of 2,2-dimethyl-heptan-3-ol that was used directly in a subsequent oxidation reaction. 1H NMR (CDCl3, 500 MHz) δ (ppm): 3.2 (m, 1H), 1.2-1.7 (m, 3H), 0.93 (m, 3H), 0.89 (s, 9H). was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar The vessel was maintained under N2 maintaining the temperature below −55° C to warm to −5° C. over one hour The reaction was cooled again to −60° C. slowly quenched with NH4Cl/H2O solution maintaining the temperature below −50° C 100 mL of water were added to warm to room temperature The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil The product was extracted with ethyl ether the ether was dried evaporated carefully

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

Procedure: 2,2-Dimethyl-heptan-3-ol (0.23 mol) was dissolved in 350 mL of CH2Cl2 in a 500 mL round bottom flask with a magnetic stirbar. The flask was partially cooled with ice. 76.6 g (0.355 mol) of pyridinium chlorochromate was added, while vigorously stirring. The reaction turned black and warmed up slightly. The reaction mixture was stirred at room temperature for 24 hours. The solution was decanted away from the black sludge, which was rinsed with hexane. The organic extracts were combined and chromatographed directly on silica gel. (Note: only silica has been found to trap and remove the reduced non-reacted chromium compounds). The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction to yield 29.19 g of product at 88% yield. 1H NMR (CDCl3, 500 MHz) δ (ppm): 2.48 (t, 2H), 1.54 (m, 2H), 1.28 (m, 2H), 1.13 (s, 9H), 0.90 (m, 3H). The flask was partially cooled with ice warmed up slightly The reaction mixture was stirred at room temperature for 24 hours The solution was decanted away from the black sludge, which was rinsed with hexane chromatographed directly on silica gel (Note: only silica has been found to trap remove the reduced non-reacted chromium compounds) The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction

Conditions: temp:-65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20 g (0.232 mol) of pivaldehyde dissolved in 600 mL of THF was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar, thermometer and rubber stopper. The vessel was maintained under N2. The reaction mixture was cooled to −65° C. in a dry ice/acetone bath. 112 mL (0.279 mol) of a 2.5 M BuLi solution in hexane was slowly added in 5 mL portions with a 20 mL glass syringe, maintaining the temperature below −55° C. The reaction was stirred at −60° C. for one hour, then allowed to warm to −5° C. over one hour. The reaction was cooled again to −60° C. and slowly quenched with NH4Cl/H2O solution, maintaining the temperature below −50° C. 100 mL of water were added and the reaction was allowed to warm to room temperature. The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil was observed. The product was extracted with ethyl ether, and the ether was dried and evaporated carefully to yield 31.0 g of 2,2-dimethyl-heptan-3-ol that was used directly in a subsequent oxidation reaction. 1H NMR (CDCl3, 500 MHz) δ (ppm): 3.2 (m, 1H), 1.2-1.7 (m, 3H), 0.93 (m, 3H), 0.89 (s, 9H). was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar The vessel was maintained under N2 maintaining the temperature below −55° C to warm to −5° C. over one hour The reaction was cooled again to −60° C. slowly quenched with NH4Cl/H2O solution maintaining the temperature below −50° C 100 mL of water were added to warm to room temperature The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil The product was extracted with ethyl ether the ether was dried evaporated carefully

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

Procedure: 2,2-Dimethyl-heptan-3-ol (0.23 mol) was dissolved in 350 mL of CH2Cl2 in a 500 mL round bottom flask with a magnetic stirbar. The flask was partially cooled with ice. 76.6 g (0.355 mol) of pyridinium chlorochromate was added, while vigorously stirring. The reaction turned black and warmed up slightly. The reaction mixture was stirred at room temperature for 24 hours. The solution was decanted away from the black sludge, which was rinsed with hexane. The organic extracts were combined and chromatographed directly on silica gel. (Note: only silica has been found to trap and remove the reduced non-reacted chromium compounds). The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction to yield 29.19 g of product at 88% yield. 1H NMR (CDCl3, 500 MHz) δ (ppm): 2.48 (t, 2H), 1.54 (m, 2H), 1.28 (m, 2H), 1.13 (s, 9H), 0.90 (m, 3H). The flask was partially cooled with ice warmed up slightly The reaction mixture was stirred at room temperature for 24 hours The solution was decanted away from the black sludge, which was rinsed with hexane chromatographed directly on silica gel (Note: only silica has been found to trap remove the reduced non-reacted chromium compounds) The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction

Conditions: temp:-65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20 g (0.232 mol) of pivaldehyde dissolved in 600 mL of THF was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar, thermometer and rubber stopper. The vessel was maintained under N2. The reaction mixture was cooled to −65° C. in a dry ice/acetone bath. 112 mL (0.279 mol) of a 2.5 M BuLi solution in hexane was slowly added in 5 mL portions with a 20 mL glass syringe, maintaining the temperature below −55° C. The reaction was stirred at 60° C. for one hour, then allowed to warm to −5° C. over one hour. The reaction was cooled again to 60° C. and slowly quenched with NH4Cl/H2O solution, maintaining the temperature below −50° C. 100 mL of water were added and the reaction was allowed to warm to room temperature. The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil was observed. The product was extracted with ethyl ether, and the ether was dried and evaporated carefully to yield 31.0 g of 2,2-dimethyl-heptan-3-ol that was used directly in a subsequent oxidation reaction. 1H NMR (CDCl3, 500 MHz) δ (ppm): 3.2 (m, 1H), 1.2-1.7 (m, 3H), 0.93 (m, 3H), 0.89 (s, 9H). was added to a 2 L 3-neck round bottom flask equipped with a magnetic stir bar The vessel was maintained under N2 maintaining the temperature below −55° C to warm to −5° C. over one hour The reaction was cooled again to 60° C. slowly quenched with NH4Cl/H2O solution maintaining the temperature below −50° C 100 mL of water were added to warm to room temperature The THF was removed on a rotary evaporator with a bath temperature of 25° C. until an oil The product was extracted with ethyl ether the ether was dried evaporated carefully

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

Procedure: 2,2-Dimethyl-heptan-3-ol (0.23 mol) was dissolved in 350 mL of CH2Cl2 in a 500 mL round bottom flask with a magnetic stirbar. The flask was partially cooled with ice. 76.6 g (0.355 mol) of pyridinium chlorochromate was added, while vigorously stirring. The reaction turned black and warmed up slightly. The reaction mixture was stirred at room temperature for 24 hours. The solution was decanted away from the black sludge, which was rinsed with hexane. The organic extracts were combined and chromatographed directly on silica gel. (Note: only silica has been found to trap and remove the reduced non-reacted chromium compounds). The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction to yield 29.19 g of product at 88% yield. 1H NMR (CDCl3, 500 MHz) δ (ppm): 2.48 (t, 2H), 1.54 (m, 2H), 1.28 (m, 2H), 1.13 (s, 9H), 0.90 (m, 3H). The flask was partially cooled with ice warmed up slightly The reaction mixture was stirred at room temperature for 24 hours The solution was decanted away from the black sludge, which was rinsed with hexane chromatographed directly on silica gel (Note: only silica has been found to trap remove the reduced non-reacted chromium compounds) The product, 2,2-dimethyl-heptan-3-one, eluted with CH2Cl2/hexane and in a subsequent 10% ethyl acetate/hexane fraction