Hydrochloric Acid → N-(2-Chloropropanoyl)glycine

Temperature

0 °C

In a mixture composed of 80 g (2.0 mol) and 200 ml of water was dissolved with stirring 165 g (2.2 mol) of glycine and the mixture was cooled to 0° C. To the aqueous solution, there were simultaneously added dropwise 254 g (2.0 mol) of β-chloropropionyl chloride and an aqueous solution containing 127.2 g (1.2 mol) of sodium carbonate dissolved in 400 ml of water. After the completion of the reaction, 1 liter of acetonitrile was added to the reaction solution and the mixture was then acidified by adding 200 ml of concentrated hydrochloric acid. 1 liter of acetonitrile was further added to extract and the acetonitrile layer was separated. The acetonitrile solution was concentrated and the crystals thus deposited were collected and recrystallized from ethyl acetate to obtain 235.3 g of N-(β-chloropropanoyl)glycine.

1. dissolutionwas dissolved
2. additionwas added to the reaction solution
3. extractionto extract
4. customthe acetonitrile layer was separated
5. concentrationThe acetonitrile solution was concentrated
6. customthe crystals thus deposited were collected
7. customrecrystallized from ethyl acetate

ORD record

ord-f6ff87f16f79458383959471adfbce8c

Source dataset

uspto-grants-1984_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04455366