CARBAMICACIDHEXYLESTER

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 918 parts of hexyl alcohol, 300 parts of urea and 14 parts of a cation exchanger which is commercially available under the registered name Amberlite 200 and, having been treated in accordance with Example (1 a), contains nickel, is heated to 130° C. whilst stirring. The temperature is then raised to 150° C. in the course of 6 hours and maintained thereat for a further 4 hours. After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure. 680 parts of hexyl carbamate (94% of theory) are obtained. Melting point= 56°-57° C. The temperature is then raised to 150° C. in the course of 6 hours maintained After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 918 parts of hexyl alcohol, 300 parts of urea and 14 parts of a cation exchanger which is commercially available under the registered name Amberlite 200 and, having been treated in accordance with Example (1 a), contains nickel, is heated to 130° C. whilst stirring. The temperature is then raised to 150° C. in the course of 6 hours and maintained thereat for a further 4 hours. After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure. 680 parts of hexyl carbamate (94% of theory) are obtained. Melting point= 56°-57° C. The temperature is then raised to 150° C. in the course of 6 hours maintained After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 918 parts of hexyl alcohol, 300 parts of urea and 14 parts of a cation exchanger which is commercially available under the registered name Amberlite 200 and, having been treated in accordance with Example (1 a), contains nickel, is heated to 130° C. whilst stirring. The temperature is then raised to 150° C. in the course of 6 hours and maintained thereat for a further 4 hours. After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure. 680 parts of hexyl carbamate (94% of theory) are obtained. Melting point= 56°-57° C. The temperature is then raised to 150° C. in the course of 6 hours maintained After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The procedure described in Example 11 is followed, but additionally 0.5 part of zinc-II acetate is included in the reaction mixture. Analysis by gas chromatography shows that within the same period of time 94% of the n-hexyl carbamate are converted and 20.3 parts of di-n-hexyl carbonate (93.9% of theory, based on converted n-hexyl carbamate), of boiling point 122°-124° C./4 mbar have been formed.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The procedure described in Example 1 is followed, but additionally 5 parts of p-dimethylaminopyridine are introduced into the reaction mixture. Analysis by gas chromatography shows that over the same period 44.8% of n-hexyl carbamate have been converted and 101 parts of di-n-hexyl carbonate (98.0% of theory, based on converted n-hexyl carbamate) are formed; the product is isolated by subsequent fractional distillation at 121°-23° C./4 mbar.

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 918 parts of hexyl alcohol, 300 parts of urea and 14 parts of a cation exchanger which is commercially available under the registered name Amberlite 200 and, having been treated in accordance with Example (1 a), contains nickel, is heated to 130° C. whilst stirring. The temperature is then raised to 150° C. in the course of 6 hours and maintained thereat for a further 4 hours. After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure. 680 parts of hexyl carbamate (94% of theory) are obtained. Melting point= 56°-57° C. The temperature is then raised to 150° C. in the course of 6 hours maintained After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure