tert-butyl N-(benzylamino)carbamate

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

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

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

Procedure: To a solution of N'-benzylhydrazinecarboxylic acid tert-butyl ester (2.5 g, 11.8 mmol) in 99% ethanol (40 ml) was added ethyl isocyanate (1.1 g, 15.2 mmol) and the mixture was stirred for 2 h. Then the mixture was concentrated in vacuo and chromatographed on silica (20 g) with petrol ether/ethyl acetate 3:2 to give 3.0 g of 2-benzyl-1-tert-butoxycarbonyl-4-ethylsemicarbazide. Then the mixture was concentrated in vacuo chromatographed on silica (20 g) with petrol ether/ethyl acetate 3:2

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

Procedure: To a solution of N'-benzylidenehydrazinecarboxylic acid tert-butyl ester (2.7 g, 12.3 mmol) in tetrahydrofuran (100 ml) was added 10% palladium on carbon (0.3 g) and the mixture was hydrogenated with 280 ml of hydrogen for 40 min at atmospheric pressure. The mixture was filtered through a plug of celite and the filtrate was concentrated in vacuo to give 2.63 g of N'-benzylhydrazinecarboxylic acid tert-butyl ester. The mixture was filtered through a plug of celite the filtrate was concentrated in vacuo

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

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

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

Procedure: To a solution of N′-benzylhydrazinecarboxylic acid tert-butyl ester (2.5 g, 11.8 mmol) in 99% ethanol (40 ml) was added ethyl isocyanate (1.1 g, 15.2 mmol) and the mixture was stirred for 2 h. Then the mixture was concentrated in vacuo and chromatographed on silica (20 g) with petrol etherlethyl acetate 3:2 to give 3.0 g of 2-benzyl-1-tert-butoxycarbonyl-4-ethylsemicarbazide. Then the mixture was concentrated in vacuo chromatographed on silica (20 g) with petrol etherlethyl acetate 3:2

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

Procedure: To a solution of N′-benzylidenehydrazinecarboxylic acid tert-butyl ester (2.7 g, 12.3 mmol) in tetrahydrofuran (100 ml) was added 10% palladium on carbon (0.3 g) and the mixture was hydrogenated with 280 ml of hydrogen for 40 min at atmospheric pressure. The mixture was filtered through a plug of celite and the filtrate was concentrated in vacuo to give 2.63 9 of N′-benzylhydrazinecarboxylic acid tert-butyl ester. The mixture was filtered through a plug of celite the filtrate was concentrated in vacuo

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

Procedure: To a solution of N′-benzylidenehydrazinecarboxylic acid tert-butyl ester (2.7 g, 12.3 mmol) in tetrahydrofuran (100 ml) was added 10% palladium on carbon (0.3 g) and the mixture was hydrogenated with 280 ml of hydrogen for 40 min at atmospheric pressure. The mixture was filtered through a plug of celite and the filtrate was concentrated in vacuo to give 2.63 9 of N′-benzylhydrazinecarboxylic acid tert-butyl ester. The mixture was filtered through a plug of celite the filtrate was concentrated in vacuo

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

Procedure: ##STR186## To a solution of N'-benzylhydrazinecarboxylic acid tert-butyl ester (2.5 g, 11.8 mmol) in 99% ethanol (40 ml) was added ethyl isocyanate (1.1 g, 15.2 mmol) and the mixture was stirred for 2 h. Then the mixture was concentrated in vacuo and chromatographed on silica (20 g) with petrol ether/ethyl acetate 3:2 to give 3.0 g of 2-benzyl-1-tert-butoxycarbonyl-4-ethylsemicarbazide. Then the mixture was concentrated in vacuo chromatographed on silica (20 g) with petrol ether/ethyl acetate 3:2

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

Procedure: ##STR186## To a solution of N'-benzylhydrazinecarboxylic acid tert-butyl ester (2.5 g, 11.8 mmol) in 99% ethanol (40 ml) was added ethyl isocyanate (1.1 g, 15.2 mmol) and the mixture was stirred for 2 h. Then the mixture was concentrated in vacuo and chromatographed on silica (20 g) with petrol ether/ethyl acetate 3:2 to give 3.0 g of 2-benzyl-1-tert-butoxycarbonyl-4-ethylsemicarbazide. Then the mixture was concentrated in vacuo chromatographed on silica (20 g) with petrol ether/ethyl acetate 3:2

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

Procedure: ##STR185## To a solution of N'-benzylidenehydrazinecarboxylic acid tert-butyl ester (2.7 g, 12.3 mmol) in tetrahydrofuran (100 ml) was added 10% palladium on carbon (0.3 g) and the mixture was hydrogenated with 280 ml of hydrogen for 40 min at atmospheric pressure. The mixture was filtered through a plug of celite and the filtrate was concentrated in vacuo to give 2.63 g of N'-benzylhydrazinecarboxylic acid tert-butyl ester. The mixture was filtered through a plug of celite the filtrate was concentrated in vacuo