hexadecyl carbonochloridate

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

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

Procedure: 6.3 Grams of N-amino-4-methylpiperadine, 6.0 g of triethylamine and 120 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the solution was slowly added dropwise 15.2 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from acetonitrile to obtain 16.8 g of the desired product. m.p. 92° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from acetonitrile

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

Procedure: 8.6 Grams of N-(2-aminoethyl)morpholine, 7.2 g of triethylamine and 120 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the resulting solution was slowly added dropwise 18.2 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from acetonitrile to obtain 21.1 g of the desired product. m.p. 65° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from acetonitrile

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

Procedure: 7.3 Grams of N-(2-aminoethyl)piperidine, 5.2 g of triethylamine and 100 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the resulting solution was slowly added dropwise 15.8 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from methanol to obtain 16.3 g of the desired product. m.p. 48° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from methanol

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

Procedure: Following essentially the procedure of Example 1(a), and using in place of 3-piperidinemethanol, an approximately equivalent amount of 2-piperidinemethanol, and using in place of octadecyl chloroformate, an approximately equivalent amount of hexadecyl chloroformate, a white solid was obtained.

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

Procedure: 6.3 Grams of N-amino-4-methylpiperadine, 6.0 g of triethylamine and 120 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the solution was slowly added dropwise 15.2 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from acetonitrile to obtain 16.8 g of the desired product. m.p. 92° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from acetonitrile

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

Procedure: 8.6 Grams of N-(2-aminoethyl)morpholine, 7.2 g of triethylamine and 120 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the resulting solution was slowly added dropwise 18.2 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from acetonitrile to obtain 21.1 g of the desired product. m.p. 65° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from acetonitrile

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

Procedure: 8.6 Grams of N-(2-aminoethyl)morpholine, 7.2 g of triethylamine and 120 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the resulting solution was slowly added dropwise 18.2 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from acetonitrile to obtain 21.1 g of the desired product. m.p. 65° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from acetonitrile

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

Procedure: 7.3 Grams of N-(2-aminoethyl)piperidine, 5.2 g of triethylamine and 100 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the resulting solution was slowly added dropwise 15.8 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from methanol to obtain 16.3 g of the desired product. m.p. 48° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from methanol

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

Procedure: 7.3 Grams of N-(2-aminoethyl)piperidine, 5.2 g of triethylamine and 100 ml of chloroform were charged in a flask equipped with a stirrer, a condenser and a calcium chloride drying tube and stirred with ice cooling. To the resulting solution was slowly added dropwise 15.8 g of hexadecyl chloroformate. After completion of the addition, the temperature of the solution was returned to room temperature, followed by refluxing with heating for 0.5 hour. The reaction mixture was cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate and, then, concentrated under reduced pressure. The residue was recrystallized from methanol to obtain 16.3 g of the desired product. m.p. 48° C. equipped with a stirrer, a condenser and a calcium chloride drying tube After completion of the addition was returned to room temperature by refluxing with heating for 0.5 hour washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was recrystallized from methanol

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Methylenepropane-1,3-diol (5.0 g), hexadecyloxycarbonylchloride (17.4 g) and pyridine (4.4 g) was dissolved in methylene chloride (60 ml). The mixture was stirred for 2.5 hours at 22° C. The mixture was purified through a column of silica gel 60 (70-230 mesh, 30 g), eluting with ether/chloroform 1:1. Further purification was achieved by chromatography on a Waters PrepLC®-System 500A using a PrepPAK®-500-SILICA cartridge with ether/chloroform/pentane 1:1:3 as eluent. The mixture was purified through a column of silica gel 60 (70-230 mesh, 30 g) eluting with ether/chloroform 1:1 Further purification

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

Procedure: The preparation is carried out as described in Example 1, using 17.8 g (0.11 mole) of benzoylacetone, 30.5 g (0.1 mole) of n-hexadecyl chloroformate and 100 ml of diethyl ether as well as 11 g (0.11 mole) of triethylamine. The crude product (34.7 g) obtained is recrystallised from a mixture of 85 ml of isopropanol and 10 ml of water. The white crystals melt at 31° C.