heptadecanoyl chloride

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

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

Procedure: In a one L three-necked flask were placed 16.0 g (0.12 mol) of L-aspartic acid and an aqueous solution of 9.6 g (0.24 mol) of sodium hydroxide in 150 mL of water under stirring. After the L-aspartic acid was dissolved, 120 mL of acetone was added to the mixture in the flask. Then, to the resultant reaction liquid which had been cooled to 0° C. were added dropwise over a period of 30 minutes, 29.0 g (0.1 mol) of heptadecanoyl chloride and an aqueous solution of 4 g sodium hydroxide in 30 mL of water, while maintaining the reaction temperature at 0 to 5° C. and pH at 11 to 12. Thereafter, by gradually raising the temperature of the reaction liquid to room temperature (25° C.) under stirring over a period of 2 hours, a solution of disodium heptadecanoyl-L-aspartate was obtained. To the resultant solution was added 65 mL of 5N hydrochloric acid to lower the pH of the solution to 1. The crystal thus precipitated was separated from the solution by means of vacuum filtration, washed with water and dried under reduced pressure. The resultant crystal was washed with 500 mL of hexane, dried and recrystallized from a mixed solvent of ethanol/water (8:1). As a result 21.0 g (0.054 mol) of N-heptadecanoyl-L-aspartic acid was obtained in a yield of 54.3% based on the fed heptadecanoyl chloride. The physical properties of the objective N-heptadecanoyl-L-aspartic acid were as follows. Then, to the resultant reaction liquid which were added dropwise over a period of 30 minutes Thereafter, by gradually raising the temperature of the reaction liquid to room temperature (25° C.)

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

Procedure: In a one L three-necked flask were placed 16.0 g (0.12 mol) of L-aspartic acid and an aqueous solution of 9.6 g (0.24 mol) of sodium hydroxide in 150 mL of water under stirring. After the L-aspartic acid was dissolved, 120 mL of acetone was added to the mixture in the flask. Then, to the resultant reaction liquid which had been cooled to 0° C. were added dropwise over a period of 30 minutes, 29.0 g (0.1 mol) of heptadecanoyl chloride and an aqueous solution of 4 g sodium hydroxide in 30 mL of water, while maintaining the reaction temperature at 0 to 5° C. and pH at 11 to 12. Thereafter, by gradually raising the temperature of the reaction liquid to room temperature (25° C.) under stirring over a period of 2 hours, a solution of disodium heptadecanoyl-L-aspartate was obtained. To the resultant solution was added 65 mL of 5N hydrochloric acid to lower the pH of the solution to 1. The crystal thus precipitated was separated from the solution by means of vacuum filtration, washed with water and dried under reduced pressure. The resultant crystal was washed with 500 mL of hexane, dried and recrystallized from a mixed solvent of ethanol/water (8:1). As a result 21.0 g (0.054 mol) of N-heptadecanoyl-L-aspartic acid was obtained in a yield of 54.3% based on the fed heptadecanoyl chloride. The physical properties of the objective N-heptadecanoyl-L-aspartic acid were as follows. Then, to the resultant reaction liquid which were added dropwise over a period of 30 minutes Thereafter, by gradually raising the temperature of the reaction liquid to room temperature (25° C.)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a one L (liter) two-necked flask were placed 102.1 g (0.38 mol) of heptadecanoic acid and 200 milliliter (mL) of cyclohexane, and the flask was equipped with a 100 mL dropping funnel containing 67.3 g (0.57 mol) of thionyl chloride and a reflux tube. Then, the heptadecanoic acid was completely dissolved under heating and stirring of the flask in an oil bath at 80° C. Thereafter the thionyl chloride was added dropwise over a period of 2 hours, and further the oil bath was maintained at 80° C. for one hour. From the resultant reaction mixture were removed the cyclohexane and the thionyl chloride under reduced pressure by means of an aspirator. The resultant reaction mixture was subjected to vacuum distillation. Thus 88.5 g (0.31 mol) of heptadecanoyl chloride was obtained in a yield of 81.2% based on the fed heptadecanoic acid. the flask was equipped with a 100 mL under heating further the oil bath was maintained at 80° C. for one hour From the resultant reaction mixture were removed the cyclohexane The resultant reaction mixture was subjected to vacuum distillation

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under a nitrogen atmosphere, p-aminophenol (109 g) was suspended in methyl ethyl ketone (2000 ml) and the suspension was heated to 70° C. Heptadecanoyl chloride (152 g) was added to the suspension with vigorous stirring, followed by refluxing with heating for 2 hours. A 5% aqueous hydrochloric acid solution (500 ml) was added to the resulting reaction mixture with vigorous stirring. The reaction mixture was cooled to room temperature to precipitate a white crystal. This crystal was filtered off under reduced pressure and recrystallized from methyl ethyl ketone to obtain 150 g of the desired product. Yield 80%; m.p. 137° C. by refluxing with heating for 2 hours The reaction mixture was cooled to room temperature to precipitate a white crystal This crystal was filtered off under reduced pressure recrystallized from methyl ethyl ketone

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

Procedure: A 171 mg amount of hexadecanecarboxylic acid chloride was added to a solution of 100 mg of 7-amino-2,2,6-trimethyl-2,3-dihydrobenzofuran and 63 mg of triethylamine in 2 ml of dichloromethane, and the mixture was stirred at room temperature for one hour. A 10 ml amount of a saturated sodium hydrogencarbonate solution was added thereto, and the mixture was extracted twice with 20 ml of ethyl acetate. the mixture was extracted twice with 20 ml of ethyl acetate

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

Procedure: In a one L three-necked flask were placed 16.0 g (0.12 mol) of L-aspartic acid and an aqueous solution of 9.6 g (0.24 mol) of sodium hydroxide in 150 mL of water under stirring. After the L-aspartic acid was dissolved, 120 mL of acetone was added to the mixture in the flask. Then, to the resultant reaction liquid which had been cooled to 0° C. were added dropwise over a period of 30 minutes, 29.0 g (0.1 mol) of heptadecanoyl chloride and an aqueous solution of 4 g sodium hydroxide in 30 mL of water, while maintaining the reaction temperature at 0 to 5° C. and pH at 11 to 12. Thereafter, by gradually raising the temperature of the reaction liquid to room temperature (25° C.) under stirring over a period of 2 hours, a solution of disodium heptadecanoyl-L-aspartate was obtained. To the resultant solution was added 65 mL of 5N hydrochloric acid to lower the pH of the solution to 1. The crystal thus precipitated was separated from the solution by means of vacuum filtration, washed with water and dried under reduced pressure. The resultant crystal was washed with 500 mL of hexane, dried and recrystallized from a mixed solvent of ethanol/water (8:1). As a result 21.0 g (0.054 mol) of N-heptadecanoyl-L-aspartic acid was obtained in a yield of 54.3% based on the fed heptadecanoyl chloride. The physical properties of the objective N-heptadecanoyl-L-aspartic acid were as follows. Then, to the resultant reaction liquid which were added dropwise over a period of 30 minutes Thereafter, by gradually raising the temperature of the reaction liquid to room temperature (25° C.)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a one L (liter) two-necked flask were placed 102.1 g (0.38 mol) of heptadecanoic acid and 200 milliliter (mL) of cyclohexane, and the flask was equipped with a 100 mL dropping funnel containing 67.3 g (0.57 mol) of thionyl chloride and a reflux tube. Then, the heptadecanoic acid was completely dissolved under heating and stirring of the flask in an oil bath at 80° C. Thereafter the thionyl chloride was added dropwise over a period of 2 hours, and further the oil bath was maintained at 80° C. for one hour. From the resultant reaction mixture were removed the cyclohexane and the thionyl chloride under reduced pressure by means of an aspirator. The resultant reaction mixture was subjected to vacuum distillation. Thus 88.5 g (0.31 mol) of heptadecanoyl chloride was obtained in a yield of 81.2% based on the fed heptadecanoic acid. the flask was equipped with a 100 mL under heating further the oil bath was maintained at 80° C. for one hour From the resultant reaction mixture were removed the cyclohexane The resultant reaction mixture was subjected to vacuum distillation