Ethyl bromoacetate → HCID 54389077, compound

Temperature

5 °C

Combine phenylacetonitrile (5.85 g, 50.0 mmol) and tetrahydrofuran (140 mL). Cool to about 5° C. Add dropwise, a solution of sodium bis(trimethylsilyl)amide (800 mL, 1 M in tetrahydrofuran, 800 mmol). When the addition is complete, warm the reaction mixture to ambient temperature and allow to stir for 1 hour. Transfer the above solution via cannula into a cooled (−8° C.) solution of ethyl bromoacetate (84.5 mL, 762 mmol) in tetrahydrofuran (500 mL) at such a rate that the temperature of the reaction mixture does not rise above about 20° C. Allow to stir at ambient temperature. After 18 hours, dilute with diethyl ether (1.5 L) and extract with saturated aqueous solution of ammonium chloride, then water, and then saturated aqueous solution of sodium chloride. Dry the organic layer over MgSO4, filter, and concentrate in vacuo to obtain a residue. Distill the residue by bulb-to-bulb distillation to give the title compound: bp; 140-150° C. at 0.2 mm Hg.

1. additionAdd dropwise
2. additionWhen the addition
3. temperaturewarm the reaction mixture to ambient temperature
4. customdoes not rise above about 20° C
5. stirringto stir at ambient temperature
6. waitAfter 18 hours
7. extractionextract with saturated aqueous solution of ammonium chloride
8. dry with materialDry the organic layer over MgSO4
9. filtrationfilter
10. concentrationconcentrate in vacuo
11. customto obtain a residue
12. distillationDistill the residue
13. distillationby bulb-to-bulb distillation

ORD record

ord-974d95d216404318b84a357c1f90b6bf

Source dataset

uspto-grants-2001_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06211199B1