2-cyano-N-(2-hydroxyethyl)acetamide

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Cyano-N-(2-hydroxyethyl)acetamide (4.62 g, 36.1 mmol), cyclohexanone (3.89 g, 4.10 mL, 39.7 mmol), acetic acid (0.433 g, 0.413 mL, 7.21 mmol) and ammonium acetate (2.78 g, 36.1 mmol) were suspended in toluene (150 mL) and the mixture heated to reflux under Dean-Stark conditions until no more water was collected (˜1.5 h). The mixture was concentrated to remove toluene before partitioning between EtOAc/Water. The organic phase was collected, dried and concentrated to a lower volume before addition of small quantities of heptane. The glass was etched until precipitation occurred and the solid collected by filtration. The desired product was isolated in 3 batches (4.2 g, 20.2 mmol, 56%). The sample was used directly in the next step without any further purification. the mixture heated was collected (˜1.5 h) The mixture was concentrated to remove toluene before partitioning between EtOAc/Water The organic phase was collected dried concentrated to a lower volume before addition of small quantities of heptane The glass was etched until precipitation the solid collected by filtration

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of ethyl 2-cyanoacetate (10 g, 9.41 mL, 88 mmol) in EtOH (100 mL) was added 2-aminoethanol (5.40 g, 5.34 mL, 88 mmol). The mixture was refluxed for 4 h before concentration in vacuo. The mixture was purified on a 100 g Silica column eluting with 0-10% MeOH/DCM. Desired fractions were collected and concentrated to yield the desired product as a brown oil (10.2 g, 79.7 mmol, 90%). The sample was used directly in the next step without any further purification. The mixture was refluxed for 4 h before concentration in vacuo The mixture was purified on a 100 g Silica column eluting with 0-10% MeOH/DCM Desired fractions were collected concentrated