Chloroacetonitrile → 2-chloro-N-(3-chloro-4-methoxyphenyl)acetamide

Temperature

0 °C

This product is obtained according to Sugasawa T., Toyoda T., Adachi M., Sasakura K., J. Am. Chem. Soc., 100 (1978), p. 4842-4852). A molar solution of boron trichloride in hexane (164 ml, 164 mmol), chloroacetonitrile (11.4 ml, 180 mmol), and a molar solution of diethylaluminum chloride in hexane (164 ml, 164 mmol) is added drop-wise in succession to a solution of 3-chloro-4-methoxy-aniline (23.6 g, 150 mmol) in an inert atmosphere at 0° C. The reaction medium is heated to reflux for 1h then cooled to 0° C., hydrolized by adding carefully 2N hydrochloric acid (90 ml), then maintained at reflux for 1h. It is chilled again and a concentrated solution of sodium bicarbonate is added to pH 14. The solution is extracted with ethyl acetate, the organic phase is washed in water, then in salt water. Dry it on magnesium sulfate, filter and evaporate under reduced pressure. The residue is recovered in isopentane, decanted, then recover what is insoluble in the minimum amount of isopropyl ether, and isopentane is added to precipitate the product. Filter and dry under vacuum. 17.26 g of a brown solid are obtained.

1. customThis product is obtained
2. temperatureThe reaction medium is heated
3. temperaturemaintained
4. temperatureat reflux for 1h
5. temperatureIt is chilled again
6. extractionThe solution is extracted with ethyl acetate
7. washthe organic phase is washed in water
8. customDry it on magnesium sulfate
9. filtrationfilter
10. customevaporate under reduced pressure
11. customThe residue is recovered in isopentane
12. customdecanted
13. customrecover what
14. additionis added
15. customto precipitate the product
16. filtrationFilter
17. customdry under vacuum

ORD record

ord-15a995fe6f9244369cd30bb461ec96b1

Source dataset

uspto-grants-2001_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06313135B1