(+-)-Aspartic Acid → HCID 12942452, compound

Participants

Reaction Steps

DL-Aspartic acid (6.65 g, 0.05 mole) in 2N-NaOH (50 ml, 2 equiv.) was cooled to 0° C. and n-butyl isocyanate (7.5 g, 0.075 mole) added during 15 minutes to the stirred solution. Stirring was continued for 2 hours and the mixture left at room temperature overnight. The mixture was then filtered, acidified with concentrated hydrochloric acid (50 ml) and heated on a steam-bath for 30 minutes. The mixture was cooled, diluted with water and continuously extracted with ether for 21/2 hours. Removal of the ether gave a solid which was recrystallised from ether to yield the product as prisms, m.p. 132° C. Yield 8.8 g=82%.

Provenance & Evidence