2-N-(1-benzylpiperidin-4-yl)cyclohexane-1,2-diamine

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

Procedure: In this reference example, a solution of 631 mg of 1-benzyl-4-(2-amino-cylohexylamino)-piperidine in a free form obtained in Reference Example 17 and 550 mg of 1,1'-carbonyldiimidazole in 10 ml of acetonitrile is stirred at room temperature for 12 hours. The deposited crystals are separated by filtration, washed with acetonitrile and then dried to obtain 383 mg of crude crystals. The crude crystals are recrystallized from 34 ml of isopropanol to obtain 300 mg of the desired product. The deposited crystals are separated by filtration washed with acetonitrile dried to obtain 383 mg of crude crystals The crude crystals are recrystallized from 34 ml of isopropanol

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

Procedure: In this reference example, 1.0 g of 1-benzyl-4-(2-nitro-cyclohexylamino)-piperidine obtained in Reference Example 16 is dissolved in 25 ml of ethanol. Then, 1.0 g of a Raney-nickel catalyst is added thereto and the mixture is stirred at room temperature in the atmosphere of hydrogen under the atmospheric pressure. The stirring is ceased when the solution has absorbed the theoretical amount of hydrogen, and the reaction solution is filtered. The filtrate is concentrated. Consequently, 0.89 g of 1-benzyl-4-(2-aminocyclohexylamino)-piperidine is obtained as the residue. has absorbed the theoretical amount of hydrogen the reaction solution is filtered The filtrate is concentrated

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

Procedure: In this reference example, a solution of 631 mg of 1-benzyl-4-(2-amino-cylohexylamino)-piperidine in a free form obtained in Reference Example 17 and 550 mg of 1,1'-carbonyldiimidazole in 10 ml of acetonitrile is stirred at room temperature for 12 hours. The deposited crystals are separated by filtration, washed with acetonitrile and then dried to obtain 383 mg of crude crystals. The crude crystals are recrystallized from 34 ml of isopropanol to obtain 300 mg of the desired product. The deposited crystals are separated by filtration washed with acetonitrile dried to obtain 383 mg of crude crystals The crude crystals are recrystallized from 34 ml of isopropanol

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

Procedure: In this reference example, 1.0 g of 1-benzyl-4-(2-nitro-cyclohexylamino)-piperidine obtained in Reference Example 16 is dissolved in 25 ml of ethanol. Then, 1.0 g of a Raney-nickel catalyst is added thereto and the mixture is stirred at room temperature in the atmosphere of hydrogen under the atmospheric pressure. The stirring is ceased when the solution has absorbed the theoretical amount of hydrogen, and the reaction solution is filtered. The filtrate is concentrated. Consequently, 0.89 g of 1-benzyl-4-(2-aminocyclohexylamino)-piperidine is obtained as the residue. has absorbed the theoretical amount of hydrogen the reaction solution is filtered The filtrate is concentrated