Butanoic acid, 2-amino-2-ethyl-, ethyl ester

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: The title compound was synthesized in analogy to Example 1, using 5-cyclopropyl-6-(isobutylsulfonyl)picolinic acid (Example 351 b) and 2-amino-2-ethyl-butanoic acid ethyl ester (CAN 189631-96-7) as starting materials. MS (EI): m/e=425.4 [M+H]+.

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

实验步骤: The title compound was synthesized in analogy to Example 1, using 5-cyclopropyl-6-(isobutylsulfonyl)picolinic acid (Example 351 b) and 2-amino-2-ethyl-butanoic acid ethyl ester (CAN 189631-96-7) as starting materials. MS (EI): m/e=425.4 [M+H]+.

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

实验步骤: The title compound was synthesized in analogy to Example 1, using 5-cyclopropyl-6-(isobutylsulfonyl)picolinic acid (Example 351 b) and 2-amino-2-ethyl-butanoic acid ethyl ester (CAN 189631-96-7) as starting materials. MS (EI): m/e=425.4 [M+H]+.

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

实验步骤: The title compound was synthesized in analogy to Example 1, using 5-cyclopropyl-6-(isobutylsulfonyl)picolinic acid (Example 351 b) and 2-amino-2-ethyl-butanoic acid ethyl ester (CAN 189631-96-7) as starting materials. MS (EI): m/e=425.4 [M+H]+.

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: A solution of ethyl 2-[(diphenylmethylene)amino]-2-ethylbutanoate (20.79 g, 64.3 mmol), prepared in the previous step, in 200 mL of diethyl ether was cooled under nitrogen to ice-bath temperature. 1 N HCl (96 mL, 96.0 mmol) was added dropwise over 45 min. After the addition, the ice-bath was removed and the stirring continued for 15 h. The diethyl ether layer was separated and the aqueous layer was extracted two times with 50 mL of methylene chloride. The methylene chloride extracts were extracted two times with 40 mL of 2 N HCl. The aqueous layers were combined and concentrated under reduced pressure to give an oil. The oil was taken up in 200 mL of saturated NaHCO3 and stirred for 30 min. The aqueous layer was then extracted five times with methylene chloride. The organic extracts were dried (anhydrous MgSO4), filtered and the solvent removed under reduced pressure to give ethyl 2-amino-2-ethylbutanoate (9.3799 g, 92%) as a yellow liquid. was cooled under nitrogen to ice-bath temperature After the addition the ice-bath was removed The diethyl ether layer was separated the aqueous layer was extracted two times with 50 mL of methylene chloride The methylene chloride extracts were extracted two times with 40 mL of 2 N HCl concentrated under reduced pressure to give an oil The aqueous layer was then extracted five times with methylene chloride The organic extracts were dried (anhydrous MgSO4) filtered the solvent removed under reduced pressure

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

实验步骤: A solution of ethyl 2-[(diphenylmethylene)amino]-2-ethylbutanoate (20.79 g, 64.3 mmol), prepared in the previous step, in 200 mL of diethyl ether was cooled under nitrogen to ice-bath temperature. 1 N HCl (96 mL, 96.0 mmol) was added dropwise over 45 min. After the addition the ice-bath was removed and the stirring continued for 15 h. The diethyl ether layer was separated and the aqueous layer was extracted two times with 50 mL of methylene chloride. The methylene chloride extracts were extracted two times with 40 mL of 2 N HCl. The aqueous layers were combined and concentrated under reduced pressure to give an oil. The oil was taken up in 200 mL of saturated NaHCO3 and stirred for 30 min. The aqueous layer was then extracted five times with methylene chloride. The organic extracts were dried (anhydrous MgSO4), filtered and the solvent removed under reduced pressure to give ethyl 2-amino-2-ethylbutanoate (9.3799 g, 92%) as a yellow liquid. was cooled under nitrogen to ice-bath temperature was removed The diethyl ether layer was separated the aqueous layer was extracted two times with 50 mL of methylene chloride The methylene chloride extracts were extracted two times with 40 mL of 2 N HCl concentrated under reduced pressure to give an oil The aqueous layer was then extracted five times with methylene chloride The organic extracts were dried (anhydrous MgSO4) filtered the solvent removed under reduced pressure

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

实验步骤: A solution of ethyl 2-[(diphenylmethylene)amino]-2-ethylbutanoate (20.79 g, 64.3 mmol), prepared in the previous step, in 200 mL of diethyl ether was cooled under nitrogen to ice-bath temperature. 1 N HCl (96 mL, 96.0 mmol) was added dropwise over 45 min. After the addition, the ice-bath was removed and the stirring continued for 15 h. The diethyl ether layer was separated and the aqueous layer was extracted two times with 50 mL of methylene chloride. The methylene chloride extracts were extracted two times with 40 mL of 2 N HCl. The aqueous layers were combined and concentrated under reduced pressure to give an oil. The oil was taken up in 200 mL of saturated NaHCO3 and stirred for 30 min. The aqueous layer was then extracted five times with methylene chloride. The organic extracts were dried (anhydrous MgSO4), filtered and the solvent removed under reduced pressure to give ethyl 2-amino-2-ethylbutanoate (9.3799 g, 92%) as a yellow liquid. was cooled under nitrogen to ice-bath temperature After the addition the ice-bath was removed The diethyl ether layer was separated the aqueous layer was extracted two times with 50 mL of methylene chloride The methylene chloride extracts were extracted two times with 40 mL of 2 N HCl concentrated under reduced pressure to give an oil The aqueous layer was then extracted five times with methylene chloride The organic extracts were dried (anhydrous MgSO4) filtered the solvent removed under reduced pressure