Hydrochloric Acid → Ethyl 2-amino-2-methylpropanoate hydrochloride
Reaction equation
[NH2:1][C:2]([CH3:7])([CH3:6])[C:3]([OH:5])=[O:4].[ClH:8].[CH2:9](O)[CH3:10]>>[ClH:8].[NH2:1][C:2]([CH3:7])([CH3:6])[C:3]([O:5][CH2:9][CH3:10])=[O:4]Participants
Procedure
A stirred suspension of 2-amino-2-methylpropanoic acid (165 g) in ethanol at 0° C. was saturated with hydrogen chloride gas. The mixture was heated at reflux for 4 hours and the solvent was evaporated under reduced pressure to give ethyl 2-amino-2-methylpropanoate hydrochloride as a white solid. Sodium carbonate (100 g) was slowly added to a suspension of the solid in water followed by 40% aqueous formaldehyde solution (150 g) and the suspension was stirred for 3 hours. The mixture was extracted with ether, the organic solution was washed with water, dried (magnesium sulphate) and solvent evaporated under reduced pressure to give ethyl 2-(N-methyleneamino)-2-methylpropanoate (137.8 g) in equilibrium with its trimer 1,3,5-tri(1-ethoxycarbonyl-1-methylethyl)hexahydrotriazine as a colourless oil, IR (liquid film) 2980(s), 1725(vs), 1250(s), 1140(vs).
Workup
- temperatureThe mixture was heated
- temperatureat reflux for 4 hours
- customthe solvent was evaporated under reduced pressure
Sources & evidence
- ORD record
- ord-7470495cd0284d2397418599683f6e68
- Source dataset
- uspto-grants-2000_02
- Patent number
- US06028032
Reaction notes
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