Pyridine → 2-chloro-N-(3-chloro-4-fluorophenyl)acetamide

To 130 ml. of toluene was added, with stirring, 24.0 g. (0.165 mole) of 3-chloro-4-fluoroaniline and 13.5 ml. (0.166 mole) of pyridine. The resulting solution was cooled to ca 0° C. and 13.2 ml. (0.166 mole) of 2-chloroacetyl chloride was added. The reaction mixture was stirred at room temperature for 5 hours and then it was extracted twice with 100 ml. of 1N hydrochloric acid, followed by 100 ml. of saturated sodium chloride solution. The resulting toluene solution was dried using magnesium sulfate, and the it was concentrated in vacuo to give 32.6 g. (88% yield) of N-(2-chloroacetyl)-3-chloro-4-fluoroaniline.

1. temperatureThe resulting solution was cooled to ca 0° C.
2. stirringThe reaction mixture was stirred at room temperature for 5 hours
3. extractionit was extracted twice with 100 ml
4. dry with materialThe resulting toluene solution was dried
5. concentrationthe it was concentrated in vacuo
6. customto give 32.6 g

ORD-Eintrag

ord-5cd4301454594103929fe356de027fc7

Quelldatensatz

uspto-grants-1988_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04791129