Ammonium → 3,4-Dimethylpyrrolidine-2,5-dione

Temperatur

60 °C

1 g of 2,3-dimethylsuccinic acid (a mixture of D-, L-, and meso-isomers) was added to 10 ml of 28% aqueous ammonium solution. The mixture was heated and stirred at about 60° C. for 1 hour. After cooling, to the reaction mixture was added aqueous hydrochloric acid solution so as to neutralize, and then the mixture was extrated twice with 10 ml of ethyl acetate. The extract was concentrated to obtain 0.73 g of 2,3-dimethylsuccinimide (a mixture of D-, L, and meso-isomers).

1. temperatureThe mixture was heated
2. temperatureAfter cooling, to the reaction mixture
3. concentrationThe extract was concentrated

ORD-Eintrag

ord-64a8af986959487aa0255059ff310410

Quelldatensatz

uspto-grants-1983_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04419443