2,2,6,6-tetrahalocyclohexanone

Details 2,2,6,6-tetrahalocyclohexanone 2,2,6,6-tetrahalocyclohexanone

C - Chemistry, Metallurgy

07

C

260/618, 260/615

C07C 39/10 (2006.01) C07C 45/63 (2006.01) C07C 49/403 (2006.01)

Patent

CA 1064521

ABSTRACT 2,2,6,6-Tetrachlore(or tetrabromo)cyclohexanone is prepared by reacting in the liquid phase chlorine or bromine with a cyclohexanone compound of formula Image where Y is hydrogen or chlorine (to produce the tetrachloro compound) or hydrogen or bromine (to produce the tertrabromo compound) is the presence as catalyst of tributyl phoshine or a salt thereof. A pyprogallol compound of formula Image I wherein R1, R2 and R3 each represent hydrogen or alkyl of 1-6 carbon atoms, or a salt thereof, is prepared by hydrolysing the corresponding 2,2,6,6-tetrachlorocyclohexanone or 2,2,6,6-tetrabromocyclohexanone.

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