N-(2-aminoethyl)-2-methylpropanamide

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

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

Procedure: Methyl isobutyrate and ethylenediamine in a molar ratio of 1:3 were heated in a closed pressure vessel at 100° for 62 hrs. The mixture was cooled, clarified by filtration, and the excess ethylenediamine removed from the filtrate by distillation in vacuo. The residue was distilled, boiling point 115°-117°/0.9 mm Hg to yield N-isobutyrylethylenediamine whose identity was confirmed by examination of the NMR and IR spectra. The latter, 15 g., was suspended in 200 ml. of dry THF and a solution of 20 g. (ca. 0.5 mole) of lithium aluminum hydride in 200 ml. of dry THF was added dropwise. The mixture was refluxed for 23 hrs., the excess lithium aluminum hydride destroyed by hydrolysis. The insoluble material was removed by filtration, and the filtrate concentrated in vacuo to yield N-(2-methylpropyl)ethylenediamine as an oil, yield 37 g. The identity of the product was confirmed by examination of the NMR spectrum, and 5.8 g. (0.05 mole) thereof was then dissolved in 20 ml. of MeOH and a solution of 5.8 g. (0.055 mole) of cyanogen bromide in MeOH was added in dropwise fashion with cooling. The mixture was stirred for 1/2 hr. and then concentrated in vacuo to an oil. The latter was dissolved in methylene chloride and again concentrated in vacuo to aid in removal of last traces of MeOH. The NMR spectrum of the residue, an oil, confirmed the structure 1-(2-methylpropyl)-1H-imidazo-2-amine hydrobromide. This material was then condensed with ethyl oximinocyanoacetate substantially according to the method described in Procedure 1. The product was recovered by distillation of the solvent from the reaction mixture in vacuo. The residue was dissolved in water and acidified with acetic acid. The precipitate that formed was collected and air dried. The damp solid was recrystallized from methanol/ethanol, m.p. 242.5°-243.5° d. The mixture was cooled clarified by filtration the excess ethylenediamine removed from the filtrate by distillation in vacuo The residue was distilled

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of ethylenediamine (308 g) and methyl isobutyrate (87.15 g) was stirred at 80° C. for 15 hours. After removal of excess ethylenediamine under reduced pressure, the residue was dissolved in ethyl acetate (100 ml). Insoluble material was filtered off and the filtrate was concentrated and distilled to give N-isobutyrylethylenediamine (84.45 g). After removal of excess ethylenediamine under reduced pressure the residue was dissolved in ethyl acetate (100 ml) Insoluble material was filtered off the filtrate was concentrated distilled

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of ethylenediamine (308 g) and methyl isobutyrate (87.15 g) was stirred at 80° C. for 15 hours. After removal of excess ethylenediamine under reduced pressure, the residue was dissolved in ethyl acetate (100 ml). Insoluble material was filtered off and the filtrate was concentrated and distilled to give N-isobutyrylethylenediamine (84.45 g). After removal of excess ethylenediamine under reduced pressure the residue was dissolved in ethyl acetate (100 ml) Insoluble material was filtered off the filtrate was concentrated distilled

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

Procedure: Methyl isobutyrate and ethylenediamine in a molar ratio of 1:3 were heated in a closed pressure vessel at 100° for 62 hrs. The mixture was cooled, clarified by filtration, and the excess ethylenediamine removed from the filtrate by distillation in vacuo. The residue was distilled, boiling point 115°-117°/0.9 mm Hg to yield N-isobutyrylethylenediamine whose identity was confirmed by examination of the NMR and IR spectra. The latter, 15 g., was suspended in 200 ml. of dry THF and a solution of 20 g. (ca. 0.5 mole) of lithium aluminum hydride in 200 ml. of dry THF was added dropwise. The mixture was refluxed for 23 hrs., the excess lithium aluminum hydride destroyed by hydrolysis. The insoluble material was removed by filtration, and the filtrate concentrated in vacuo to yield N-(2-methylpropyl)ethylenediamine as an oil, yield 37 g. The identity of the product was confirmed by examination of the NMR spectrum, and 5.8 g. (0.05 mole) thereof was then dissolved in 20 ml. of MeOH and a solution of 5.8 g. (0.055 mole) of cyanogen bromide in MeOH was added in dropwise fashion with cooling. The mixture was stirred for 1/2 hr. and then concentrated in vacuo to an oil. The latter was dissolved in methylene chloride and again concentrated in vacuo to aid in removal of last traces of MeOH. The NMR spectrum of the residue, an oil, confirmed the structure 1-(2-methylpropyl)-1H-imidazo-2-amine hydrobromide. This material was then condensed with ethyl oximinocyanoacetate substantially according to the method described in Procedure 1. The product was recovered by distillation of the solvent from the reaction mixture in vacuo. The residue was dissolved in water and acidified with acetic acid. The precipitate that formed was collected and air dried. The damp solid was recrystallized from methanol/ethanol, m.p. 242.5°-243.5° d. The mixture was cooled clarified by filtration the excess ethylenediamine removed from the filtrate by distillation in vacuo The residue was distilled

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

Procedure: A mixture of (S)-1,2-epoxy-3-phenoxypropane (0.495 g.) and N-(2-aminoethyl)isobutyramide (0.429 g) in ethanol (25 ml) was heated under reflux for 48 hours. The reaction mixture was cooled and solvent removed by rotary evaporation in vacuo. The residual solid was purified by column chromatography on silica (Merck, Art. 7736) using 5% v/v methanol in dichloromethane as eluant. The solid thereby obtained was purified by recrystallisation from ethyl acetate to give (S)-N-(2-[2-hydroxy-3-phenoxypropyl]aminoethyl)isobutyramide (0.425 g), m.p. 88°-89° C., 24 [α]D -5.8° [c, 1.04; methanol], mixed m.p. with material from Example 1, 88°-89° C. was heated under reflux for 48 hours The reaction mixture was cooled solvent removed by rotary evaporation in vacuo The residual solid was purified by column chromatography on silica (Merck, Art. 7736) The solid thereby obtained was purified by recrystallisation from ethyl acetate

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

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

Procedure: A mixture of (S)-1,2-epoxy-3-phenoxypropane (0.495 g.) and N-(2-aminoethyl)isobutyramide (0.429 g) in ethanol (25 ml) was heated under reflux for 48 hours. The reaction mixture was cooled and solvent removed by rotary evaporation in vacuo. The residual solid was purified by column chromatography on silica (Merck, Art. 7736) using 5% v/v methanol in dichloromethane as eluant. The solid thereby obtained was purified by recrystallisation from ethyl acetate to give (S)-N-(2-[2-hydroxy-3-phenoxypropyl]aminoethyl)isobutyramide (0.425 g), m.p. 88°-89° C., 24 [α]D -5.8° [c, 1.04; methanol], mixed m.p. with material from Example 1, 88°-89° C. was heated under reflux for 48 hours The reaction mixture was cooled solvent removed by rotary evaporation in vacuo The residual solid was purified by column chromatography on silica (Merck, Art. 7736) The solid thereby obtained was purified by recrystallisation from ethyl acetate

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

Procedure: The procedure of Example IX was repeated in all essential details to produce the above compound, except that equivalent amounts of ethylenediamine and ethyl 2,2-dimethylacetate were substituted for 1,2-diamino-2-methylpropane and ethyl acetate, respectively. The product, which was identified by NMR and IR spectroscopy, was recovered as an oil. to produce the above compound was recovered as an oil

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

Procedure: The procedure of Example IX was repeated in all essential details to produce the above compound, except that equivalent amounts of ethylenediamine and ethyl 2,2-dimethylacetate were substituted for 1,2-diamino-2-methylpropane and ethyl acetate, respectively. The product, which was identified by NMR and IR spectroscopy, was recovered as an oil. to produce the above compound was recovered as an oil

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 39 g (0.3 mol) of 2-(isopropylcarbonylamino)ethylamine in 150 ml of isopropyl alcohol was added 22.2 g (0.3 mol) of glycidol. The reaction mixture was stirred at 25° C. for 24 hours and evaporated in vacuo. The residual oil was chromatographed (silica gel/ethanol) to give 18.6 g (30%) of product. This compound was identified by NMR and IR spectroscopy. evaporated in vacuo The residual oil was chromatographed (silica gel/ethanol)

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 39 g (0.3 mol) of 2-(isopropylcarbonylamino)ethylamine in 150 ml of isopropyl alcohol was added 22.2 g (0.3 mol) of glycidol. The reaction mixture was stirred at 25° C. for 24 hours and evaporated in vacuo. The residual oil was chromatographed (silica gel/ethanol) to give 18.6 g (30%) of product. This compound was identified by NMR and IR spectroscopy. evaporated in vacuo The residual oil was chromatographed (silica gel/ethanol)