tert-butyl N-[(1R,2S)-2-aminocyclopentyl]carbamate

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

Procedure: cis-1,2-Cyclopentanediamine (WO98/30574) (692 mg) was dissolved in dichloromethane (10 ml), to which triethylamine (1.1 ml) and 2-(tert-butoxycarbonyloxy-imino)-2-phenylacetonitrile (493 mg) were added, and the mixture was stirred at 0° C. for 1 hour. Thereafter, 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (493 mg) were additionally added, and the mixture was stirred at room temperature for 7 hours. Water was added to the reaction mixture to separate an organic layer. The organic layer was washed with saturated saline and dried over anhydrous sodium sulfate. The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1) to obtain the title compound (395 mg) as a pale yellow oil. were added the mixture was stirred at room temperature for 7 hours to separate an organic layer The organic layer was washed with saturated saline dried over anhydrous sodium sulfate The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1)

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

Procedure: cis-1,2-Cyclopentanediamine (WO98/30574) (692 mg) was dissolved in dichloromethane (10 ml), to which triethylamine (1.1 ml) and 2-(tert-butoxycarbonyloxy-imino)-2-phenylacetonitrile (493 mg) were added, and the mixture was stirred at 0° C. for 1 hour. Thereafter, 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (493 mg) were additionally added, and the mixture was stirred at room temperature for 7 hours. Water was added to the reaction mixture to separate an organic layer. The organic layer was washed with saturated saline and dried over anhydrous sodium sulfate. The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1) to obtain the title compound (395 mg) as a pale yellow oil. were added the mixture was stirred at room temperature for 7 hours to separate an organic layer The organic layer was washed with saturated saline dried over anhydrous sodium sulfate The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1)

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

Procedure: To a solution of tert-butyl N-[(1R,2S)-2-aminocyclopentyl]carbamate (CAS number 721395-15-9; 0.50 g, 2.50 mmol) in dry DCM (8.3 ml) was added DIPEA (1.3 ml, 7.49 mmol) and 2,6-dimethoxybenzoyl chloride (CAS number 1989-53-3; 0.75 g, 3.74 mmol). The reaction was stirred at room temperature under an atmosphere of nitrogen for 17 hours and then partitioned between DCM and water, filtered through a hydrophobic frit and concentrated in vacuo. This was purified by column chromatography (silica, 50-100% ethyl acetate/petrol). To the resulting solid was then added 1,4-dioxane (2 ml) and HCl in 1,4-dioxane (4M, 2 ml) and the reaction was stirred at room temperature for 2 hours and then concentrated in vacuo, and azeotropically distilled with toluene to afford the title compound. partitioned between DCM and water filtered through a hydrophobic frit concentrated in vacuo This was purified by column chromatography (silica, 50-100% ethyl acetate/petrol) added 1,4-dioxane (2 ml) and HCl in 1,4-dioxane (4M, 2 ml) and the reaction was stirred at room temperature for 2 hours concentrated in vacuo azeotropically distilled with toluene

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

Procedure: cis-1,2-Cyclopentanediamine (WO98/30574) (692 mg) was dissolved in dichloromethane (10 ml), to which triethylamine (1.1 ml) and 2-(tert-butoxycarbonyloxy-imino)-2-phenylacetonitrile (493 mg) were added, and the mixture was stirred at 0° C. for 1 hour. Thereafter, 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (493 mg) were additionally added, and the mixture was stirred at room temperature for 7 hours. Water was added to the reaction mixture to separate an organic layer. The organic layer was washed with saturated saline and dried over anhydrous sodium sulfate. The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1) to obtain the title compound (395 mg) as a pale yellow oil. were added the mixture was stirred at room temperature for 7 hours to separate an organic layer The organic layer was washed with saturated saline dried over anhydrous sodium sulfate The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1)

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

Procedure: cis-1,2-Cyclopentanediamine (WO98/30574) (692 mg) was dissolved in dichloromethane (10 ml), to which triethylamine (1.1 ml) and 2-(tert-butoxycarbonyloxy-imino)-2-phenylacetonitrile (493 mg) were added, and the mixture was stirred at 0° C. for 1 hour. Thereafter, 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (493 mg) were additionally added, and the mixture was stirred at room temperature for 7 hours. Water was added to the reaction mixture to separate an organic layer. The organic layer was washed with saturated saline and dried over anhydrous sodium sulfate. The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1) to obtain the title compound (395 mg) as a pale yellow oil. were added the mixture was stirred at room temperature for 7 hours to separate an organic layer The organic layer was washed with saturated saline dried over anhydrous sodium sulfate The residue was purified by flash column chromatography on silica gel (dichloromethane:methanol=9:1)