4-[2-(dimethylamino)ethylamino]-4-oxobutanoic acid

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.4 g of succinic anhydride and then 1.5 cm3 of 2-dimethylaminoethylamine are added to 15 cm3 of dioxane. After stirring for 18 hours at room temperature, the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C., to give a residue which is taken up hot in 40 cm3 of methyl ethyl ketone. After cooling, the solubilized fraction is removed. The residual gum is crystallized hot from 15 cm3 of acetone. After filtration, the solid is rinsed with a minimum of acetone and then with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C. to give 2.03 g of N-(2-dimethylaminoethyl)succinamic acid in the form of a white solid melting at 155° C. the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C. to give a residue which After cooling the solubilized fraction is removed The residual gum is crystallized hot from 15 cm3 of acetone After filtration the solid is rinsed with a minimum of acetone with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.4 g of succinic anhydride and then 1.5 cm3 of 2-dimethylaminoethylamine are added to 15 cm3 of dioxane. After stirring for 18 hours at room temperature, the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C., to give a residue which is taken up hot in 40 cm3 of methyl ethyl ketone. After cooling, the solubilized fraction is removed. The residual gum is crystallized hot from 15 cm3 of acetone. After filtration, the solid is rinsed with a minimum of acetone and then with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C. to give 2.03 g of N-(2-dimethylaminoethyl)succinamic acid in the form of a white solid melting at 155° C. the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C. to give a residue which After cooling the solubilized fraction is removed The residual gum is crystallized hot from 15 cm3 of acetone After filtration the solid is rinsed with a minimum of acetone with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.4 g of succinic anhydride and then 1.5 cm3 of 2-dimethylaminoethylamine are added to 15 cm3 of dioxane. After stirring for 18 hours at room temperature, the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C., to give a residue which is taken up hot in 40 cm3 of methyl ethyl ketone. After cooling, the solubilized fraction is removed. The residual gum is crystallized hot from 15 cm3 of acetone. After filtration, the solid is rinsed with a minimum of acetone and then with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C. to give 2.03 g of N-(2-dimethylaminoethyl)succinamic acid in the form of a white solid melting at 155° C. the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C. to give a residue which After cooling the solubilized fraction is removed The residual gum is crystallized hot from 15 cm3 of acetone After filtration the solid is rinsed with a minimum of acetone with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.4 g of succinic anhydride and then 1.5 cm3 of 2-dimethylaminoethylamine are added to 15 cm3 of dioxane. After stirring for 18 hours at room temperature, the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C., to give a residue which is taken up hot in 40 cm3 of methyl ethyl ketone. After cooling, the solubilized fraction is removed. The residual gum is crystallized hot from 15 cm3 of acetone. After filtration, the solid is rinsed with a minimum of acetone and then with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C. to give 2.03 g of N-(2-dimethylaminoethyl)succinamic acid in the form of a white solid melting at 155° C. the solvent is evaporated under reduced pressure (2.7 kPa) at 20° C. to give a residue which After cooling the solubilized fraction is removed The residual gum is crystallized hot from 15 cm3 of acetone After filtration the solid is rinsed with a minimum of acetone with diethyl ether, and dried under reduced pressure (2.7 kPa) at 20° C.