Chloroacetic Acid → HCID 21069790, compound

A solution of 2-methylthioethanol (10.0 g, 0.108 mol) in dry tetrahydrofuran (25 ml) was added dropwise, over 30 min, to a suspension of sodium hydride (9.54 g of a 60% dispersion in mineral oil, 0.238 mol, washed twice with hexane) in dry tetrahydrofuran (250 ml) at 22° C. After 30 min, a solution of chloroacetic acid (10.25 g, 0.108 mol) in dry tetrahydrofuran (20 ml) was added dropwise, over 30 min at 22° C., and the resulting mixture was then heated under reflux for 5 h. The cooled mixture was treated with 250 ml of 1 N hydrochloric acid and sodium chloride added to the aqueous phase until saturation. The organic phase was separated and the aqueous phase washed with ethyl acetate. The combined organic extracts were washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Distillation of the resulting residue in vacuo gave 11.27 g (69% yield) of the title acid as a clear oil; bp 85–95° C./0.3 torr (bulb to bulb distillation, air bath temperature). 1HNMR 400 MHz (CDCl3) δ ppm: 2.18 (3H, s, SCH3), 2.76 (2H, t, J=6.6 Hz, CH2), 3.77 (2H, t, J=6.6 Hz, CH2), 4.20 (2H, s, OCH2).

1. washwashed twice with hexane) in dry tetrahydrofuran (250 ml) at 22° C
2. temperaturethe resulting mixture was then heated
3. temperatureunder reflux for 5 h
4. additionadded to the aqueous phase until saturation
5. customThe organic phase was separated
6. washthe aqueous phase washed with ethyl acetate
7. washThe combined organic extracts were washed with brine
8. dry with materialdried over anhydrous magnesium sulfate
9. concentrationconcentrated under reduced pressure
10. distillationDistillation of the resulting residue in vacuo

ORD record

ord-3e2afb34e063461cac09972e58bdcb67

Source dataset

uspto-grants-2007_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07176196B2