2,2,3-trimethylcyclohexan-1-one

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

Procedure: 28 g of 2,2,6-trimethyl-cyclohexanone are added dropwise to a suspension of Na vinylacetylide (prepared from 25 g of 1,4-dichlorobut-2-ene and 15 g of Na in liquid ammonia) in 200 ml of THF, whilst cooling, and the reaction mixture is stirred overnight at room temperature. 50 ml of water are then added, the aqueous phase is extracted with ether and the resulting organic phase is dried and concentrated. Subsequent fractional distillation gives 5.5 g of unconverted trimethylcyclohexanone and 20.7 g (corresponding to 68% of theory, based on ketone converted) of 2,2,6-trimethyl-1-(but-1'-yn-3'-en-1'-yl)-cyclohexanol of boiling point 62°-63° C/0.3 mm Hg and refractive index nD25 = 1.4982. Fragrance note: fresh, tart-woody, coniferous. whilst cooling the aqueous phase is extracted with ether the resulting organic phase is dried concentrated Subsequent fractional distillation

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

Procedure: 110 ml of a solution of 30 % H2O2 followed by 28 ml of a 6N aqueous solution of NaOH were added dropwise, while stirring and within 45 minutes and 15 minutes, respectively, to a cooled solution (0°-5°) of 40 g of β-cyclocitral (0.26 mole) in 300 ml of methanol which had been acidified beforehand with 40 drops of concentrated sulphuric acid. The reaction mixture was then kept at room temperature for 3 days, while stirring. After having added water thereto, the said mixture was extracted three times with ether and the combined organic extracts were subjected to the usual treatments of washing (water), drying (MgSO4) and concentration. There were obtained 21.5 g of trimethyl-cyclohexanone by fractional distillation; b.p. 66°-69°/12 Torr (66 %). were added dropwise The reaction mixture was then kept at room temperature for 3 days while stirring the said mixture was extracted three times with ether of washing (water) drying (MgSO4) and concentration

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

Procedure: 110 ml of a solution of 30 % H2O2 followed by 28 ml of a 6N aqueous solution of NaOH were added dropwise, while stirring and within 45 minutes and 15 minutes, respectively, to a cooled solution (0°-5°) of 40 g of β-cyclocitral (0.26 mole) in 300 ml of methanol which had been acidified beforehand with 40 drops of concentrated sulphuric acid. The reaction mixture was then kept at room temperature for 3 days, while stirring. After having added water thereto, the said mixture was extracted three times with ether and the combined organic extracts were subjected to the usual treatments of washing (water), drying (MgSO4) and concentration. There were obtained 21.5 g of trimethyl-cyclohexanone by fractional distillation; b.p. 66°-69°/12 Torr (66 %). were added dropwise The reaction mixture was then kept at room temperature for 3 days while stirring the said mixture was extracted three times with ether of washing (water) drying (MgSO4) and concentration

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

Procedure: Softening agents: trimethylcyclohexanone, ethyl lactate, cyclohexyl acetate, water, diethanolamine and 1,4-dimethoxybenzene.

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

Procedure: 28 g of 2,2,6-trimethyl-cyclohexanone are added dropwise to a suspension of Na vinylacetylide (prepared from 25 g of 1,4-dichlorobut-2-ene and 15 g of Na in liquid ammonia) in 200 ml of THF, whilst cooling, and the reaction mixture is stirred overnight at room temperature. 50 ml of water are then added, the aqueous phase is extracted with ether and the resulting organic phase is dried and concentrated. Subsequent fractional distillation gives 5.5 g of unconverted trimethylcyclohexanone and 20.7 g (corresponding to 68% of theory, based on ketone converted) of 2,2,6-trimethyl-1-(but-1'-yn-3'-en-1'-yl)-cyclohexanol of boiling point 62°-63° C/0.3 mm Hg and refractive index nD25 = 1.4982. Fragrance note: fresh, tart-woody, coniferous. whilst cooling the aqueous phase is extracted with ether the resulting organic phase is dried concentrated Subsequent fractional distillation

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

Procedure: 28 g of 2,2,6-trimethyl-cyclohexanone are added dropwise to a suspension of Na vinylacetylide (prepared from 25 g of 1,4-dichlorobut-2-ene and 15 g of Na in liquid ammonia) in 200 ml of THF, whilst cooling, and the reaction mixture is stirred overnight at room temperature. 50 ml of water are then added, the aqueous phase is extracted with ether and the resulting organic phase is dried and concentrated. Subsequent fractional distillation gives 5.5 g of unconverted trimethylcyclohexanone and 20.7 g (corresponding to 68% of theory, based on ketone converted) of 2,2,6-trimethyl-1-(but-1'-yn-3'-en-1'-yl)-cyclohexanol of boiling point 62°-63° C/0.3 mm Hg and refractive index nD25 = 1.4982. Fragrance note: fresh, tart-woody, coniferous. whilst cooling the aqueous phase is extracted with ether the resulting organic phase is dried concentrated Subsequent fractional distillation

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

Procedure: 110 ml of a solution of 30 % H2O2 followed by 28 ml of a 6N aqueous solution of NaOH were added dropwise, while stirring and within 45 minutes and 15 minutes, respectively, to a cooled solution (0°-5°) of 40 g of β-cyclocitral (0.26 mole) in 300 ml of methanol which had been acidified beforehand with 40 drops of concentrated sulphuric acid. The reaction mixture was then kept at room temperature for 3 days, while stirring. After having added water thereto, the said mixture was extracted three times with ether and the combined organic extracts were subjected to the usual treatments of washing (water), drying (MgSO4) and concentration. There were obtained 21.5 g of trimethyl-cyclohexanone by fractional distillation; b.p. 66°-69°/12 Torr (66 %). were added dropwise The reaction mixture was then kept at room temperature for 3 days while stirring the said mixture was extracted three times with ether of washing (water) drying (MgSO4) and concentration

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

Procedure: It is further noted that trimethylcyclohexanone can be prepared by a hydrogenation reaction of isophorone, followed by a Baeyer-Villiger reaction with a peracid to obtain trimethylcaprolactone on a commercial basis.

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

Procedure: Softening agents: trimethylcyclohexanone, ethyl lactate, cyclohexyl acetate, water, diethanolamine and 1,4-dimethoxybenzene.

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

Procedure: 28 g of 2,2,6-trimethyl-cyclohexanone are added dropwise to a suspension of Na vinylacetylide (prepared from 25 g of 1,4-dichlorobut-2-ene and 15 g of Na in liquid ammonia) in 200 ml of THF, whilst cooling, and the reaction mixture is stirred overnight at room temperature. 50 ml of water are then added, the aqueous phase is extracted with ether and the resulting organic phase is dried and concentrated. Subsequent fractional distillation gives 5.5 g of unconverted trimethylcyclohexanone and 20.7 g (corresponding to 68% of theory, based on ketone converted) of 2,2,6-trimethyl-1-(but-1'-yn-3'-en-1'-yl)-cyclohexanol of boiling point 62°-63° C/0.3 mm Hg and refractive index nD25 = 1.4982. Fragrance note: fresh, tart-woody, coniferous. whilst cooling the aqueous phase is extracted with ether the resulting organic phase is dried concentrated Subsequent fractional distillation

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

Procedure: 110 ml of a solution of 30 % H2O2 followed by 28 ml of a 6N aqueous solution of NaOH were added dropwise, while stirring and within 45 minutes and 15 minutes, respectively, to a cooled solution (0°-5°) of 40 g of β-cyclocitral (0.26 mole) in 300 ml of methanol which had been acidified beforehand with 40 drops of concentrated sulphuric acid. The reaction mixture was then kept at room temperature for 3 days, while stirring. After having added water thereto, the said mixture was extracted three times with ether and the combined organic extracts were subjected to the usual treatments of washing (water), drying (MgSO4) and concentration. There were obtained 21.5 g of trimethyl-cyclohexanone by fractional distillation; b.p. 66°-69°/12 Torr (66 %). were added dropwise The reaction mixture was then kept at room temperature for 3 days while stirring the said mixture was extracted three times with ether of washing (water) drying (MgSO4) and concentration