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US 4,395,371 AGranted
Process for the preparation of 2-halogeno-3-sulphonyl-acrylonitriles
AssigneeBayer Aktiengesellschaft
InventorsSiegfried Oeckl, Gero Zahl, Walter Radt
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Abstract
The preparation of a 2-halogeno-3-sulphonyl acrylonitrile from a 2,2-dihalogeno-3-sulphonyl propionitrile and water and the use of the product as a microbicidal agent are disclosed.
Claims3
A process for the preparation of a 2-halogeno-3-sulphonyl-acrylonitrile of the formula
- R.sup.1 --SO.sub.2 --CH.dbd.CX.sup.1 --CN
- wherein
- R.sup.1 denotes C.sub.6 to C.sub.18 aryl, aralkyl where the aromatic portion has up to 10 carbon atoms and the alkyl portion has up to 6 carbon atoms, C.sub.1 to C.sub.12 alkyl
- or C.sub.6 to C.sub.17 cycloalkyl, any of which radicals can optionally be substituted by a radical which does not change during the process and
- X.sup.1 denotes halogen, which comprises contacting a 2,2-dihalogeno-3-sulphonyl propionitrile of the formula
- R.sup.1 --SO.sub.2 --CH.sub.2 --CX.sub.2.sup.1 --CN
- wherein
- R.sup.1 and X.sup.1 have the meaning given above with a composition consisting essentially of water in a stoichiometric excess at a temperature of 20.degree.-130.degree. C., employing a molar ratio of 2,2-dihalogeno-3-sulphonyl-propionitrile to water of 1:5-550 at pressure of at least 0.5 bar whereby a halogen halide is formed additionally.
5 more elements
Dependencies are inferred from the claim text.