Preparation of substituted benzotrichlorides

Details Preparation of substituted benzotrichlorides Preparation of substituted benzotrichlorides

C - Chemistry, Metallurgy

07

C

260/539.3, 260/6

C07C 25/02 (2006.01) C07B 39/00 (2006.01) C07C 17/14 (2006.01) C07C 17/20 (2006.01) C07C 51/363 (2006.01) C07C 51/62 (2006.01) C07C 63/10 (2006.01) C07C 263/16 (2006.01)

Patent

CA 1317966

PREPARATION OF SUBSTITUTED BENZOTRICHLORIDES ABSTRACT OF THE DISCLOSURE A process for chlorinating a compound of the formula Image (I) in which R1 is a C1-alkyl radical, C1-alkoxy radical or C1-thioalkyl radical, and X1, X2, X3 and X4 are identical or different hydrogen or halogen, and X3 may alternatively Image or -NCO, comprising, in an initial phase, dissolving a chlorina- tion catalyst in the compound to be chlorinated, continu- ously metering this solution together with chlorine into a reaction vessel containing the compound to be chlorinated, and, after the initial phase, removing partially or fully chlorinated compounds from the reaction vessel, dissolving fresh chlorination catalyst in the removed compounds, and feeding this catalyst solution, together with chlorine, to the reaction vessel. Le A 25 160

576899

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