Process for the preparation of 3,3,5-trichloroglutarimide

Details Process for the preparation of 3,3,5-trichloroglutarimide Process for the preparation of 3,3,5-trichloroglutarimide

C - Chemistry, Metallurgy

07

D

C07D 211/88 (2006.01)

Patent

CA 2201130

3,3,5-Trichloroglutarimide is prepared by combining 4-cyano-2,2,4- trichlorobutanoyl chloride with water in an inert organic solvent at a temperature between 20 °C and 50 °C to obtain a mixture of 3,3,5-trichloroglutarimide and 3,3,5,6-tetrachloro-5,6-dihydropyridin-2-one. The 3,3,5,6-tetrachloro-5,6-dihydropyridin-2-one is then heated in the presence of water and inert organic solvent to between 90 ° C and 100 °C to convert the 3,3,5,6-tetrachloro-5,6-dihydropyridin-2-one to 3,3,5-trichloroglutarimide.

On prépare du 3,3,5-trichloroglutarimide en associant du chlorure de 4-cyano-2,2,4-trichlorobutanoyle avec de l'eau dans un solvant organique inerte, à une température comprise entre 20 DEG C et 50 DEG C, pour obtenir un mélange de 3,3,5-trichloroglutarimide et de 3,3,5,6-tétrachloro-5,6-dihydropyridine-2-one. On porte ensuite la 3,3,5,6-tétrachloro-5,6-dihydropyridin-2-one, en présence d'eau et d'un solvant organique inerte, à une température comprise entre 90 DEG C et 100 DEG C, ce qui transforme la 3,3,5,6-tétrachloro-5,6-dihydropyridine-2-one en 3,3,5-trichloroglutarimide.

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