Chloroacetyl chloride → 1-(Chloroacetyl)pyrrolidine

Temperature

0 °C

Pyrrolidine (63.9 g, 0.9 mole) was taken up in CH2Cl2 (640 mL) and cooled to 0° C. in a salt-ice water bath. To the stirred mixture was added chloroacetyl chloride (101.8 g in 450 mL of CH2Cl2, 0.9 mole) dropwise maintaining the internal temperature below 15° C. After adding the chloroacetyl chloride, the mixture was stirred for one hour at 5° C. Sodium hydroxide solution (7 M, 190 mL) was added with vigorous stirring such that the inside temperature did not exceed 20° C. The mixture was stirred for 15 minutes and the aqueous layer was separated. The organic layer was washed with saturated sodium bicarbonate solution (2×200 mL), water (1×200 mL) and dried over anhydrous sodium sulfate. The solvent was removed in vacuo and the residue was recrystallized from hexane to give 64.5 g (48.6% yield) of white plate crystals; mp 43° C.

1. temperaturedropwise maintaining the internal temperature below 15° C
2. stirringwith vigorous stirring such that the inside temperature
3. customdid not exceed 20° C
4. stirringThe mixture was stirred for 15 minutes
5. customthe aqueous layer was separated
6. washThe organic layer was washed with saturated sodium bicarbonate solution (2×200 mL), water (1×200 mL)
7. dry with materialdried over anhydrous sodium sulfate
8. customThe solvent was removed in vacuo
9. customthe residue was recrystallized from hexane
10. customto give 64.5 g (48.6% yield) of white plate crystals

ORD record

ord-0510706cae9b47c381e683be9b5ee9f1

Source dataset

uspto-grants-2007_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07166625B2