乙基 1-(2-氰乙基)哌啶-4-羧酸乙酯

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 (a) (6.4 g, 30 mmol) and ethanol (2.1 ml, 40 mmol) in chloroform (60 ml) was saturated with gaseous hydrochloric acid at 0° C. for 0.5 hours. The mixture was left 20 hours at 4° C. then concentrated in vacuo to afford a white foam. This was suspended in chloroform (60 ml), treated with 3-fluorophenylenediamine (3.8 g, 30 mmol) and heated under reflux for 1 hour. The mixture was poured onto water. The aqueous phase was then basified with sodium bicarbonate and extracted three times with dichloromethane. The organic extract was washed with water, brine, dried over magnesium sulfate and evaporated. The resulting residue was triturated with ethyl acetate, then diethyl ether to give a white solid (5.2 g, 55%). then concentrated in vacuo to afford a white foam heated under reflux for 1 hour The mixture was poured onto water extracted three times with dichloromethane The organic extract was washed with water, brine dried over magnesium sulfate evaporated The resulting residue was triturated with ethyl acetate

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

实验步骤: A solution of (a) (6.4 g, 30 mmol) and ethanol (2.1 ml, 40 mmol) in chloroform (60 ml) was saturated with gaseous hydrochloric acid at 0° C. for 0.5 hours. The mixture was left 20 hours at 4° C. then concentrated in vacuo to afford a white foam. This was suspended in chloroform (60 ml), treated with 3-fluorophenylenediamine (3.8 g, 30 mmol) and heated under reflux for 1 hour. The mixture was poured onto water. The aqueous phase was then basified with sodium bicarbonate and extracted three times with dichloromethane. The organic extract was washed with water, brine, dried over magnesium sulfate and evaporated. The resulting residue was triturated with ethyl acetate, then diethyl ether to give a white solid (5.2 g, 55%). then concentrated in vacuo to afford a white foam heated under reflux for 1 hour The mixture was poured onto water extracted three times with dichloromethane The organic extract was washed with water, brine dried over magnesium sulfate evaporated The resulting residue was triturated with ethyl acetate

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

实验步骤: A solution of piperidine-4-carboxylic acid ethyl ester (ethylisonipecotate) (4.7 g, 30 mmol), acrylonitrile (1.7 g, 31 mmol) in isopropyl alcohol (30 ml) was stirred at room temperature for 15 hours, then evaporated to dryness to afford 1-(2-cyano-ethyl)-piperidine-4-carboxylic acid ethyl ester as an oil (6.4 g, 100%). evaporated to dryness

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 (a) (6.4 g, 30 mmol) and ethanol (2.1 ml, 40 mmol) in chloroform (60 ml) was saturated with gaseous hydrochloric acid at 0° C. for 0.5 hours. The mixture was left 20 hours at 4° C. then concentrated in vacuo to afford a white foam. This was suspended in chloroform (60 ml), treated with 3-fluorophenylenediamine (3.8 g, 30 mmol) and heated under reflux for 1 hour. The mixture was poured onto water. The aqueous phase was then basified with sodium bicarbonate and extracted three times with dichloromethane. The organic extract was washed with water, brine, dried over magnesium sulfate and evaporated. The resulting residue was triturated with ethyl acetate, then diethyl ether to give a white solid (5.2 g, 55%). then concentrated in vacuo to afford a white foam heated under reflux for 1 hour The mixture was poured onto water extracted three times with dichloromethane The organic extract was washed with water, brine dried over magnesium sulfate evaporated The resulting residue was triturated with ethyl acetate

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

实验步骤: A solution of piperidine-4-carboxylic acid ethyl ester (ethylisonipecotate) (4.7 g, 30 mmol), acrylonitrile (1.7 g, 31 mmol) in isopropyl alcohol (30 ml) was stirred at room temperature for 15 hours, then evaporated to dryness to afford 1-(2-cyano-ethyl)-piperidine-4-carboxylic acid ethyl ester as an oil (6.4 g, 100%). evaporated to dryness