.alpha.,.beta.-substituted acroleins and their preparation

Details .alpha.,.beta.-substituted acroleins and their preparation .alpha.,.beta.-substituted acroleins and their preparation

C - Chemistry, Metallurgy

07

C

260/566, 260/568

C07C 47/20 (2006.01) C07C 45/51 (2006.01) C07C 47/21 (2006.01) C07C 47/232 (2006.01) C07C 47/24 (2006.01) C07C 47/277 (2006.01) C07D 303/14 (2006.01) C07D 303/16 (2006.01)

Patent

CA 1271489

Abstract of the Disclosure: Alpha,beta-substituted acroleins of the general formula I Image (I), where A and B are identical or different and are each C1-C4-alkyl, naphthyl, biphenyl or phenyl which may be monosubstituted or polysubstituted by halogen, nitro, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkyl, phenoxy or phenylsulfonyl, are prepared by a process in which a compound of the general formula III Image ( III ), where A has the above meanings and R1 and R2 are iden- tical or different and are each C1-C4-alkyl or to- gether possess the carbon atoms required to complete a ring, is reacted with a phosphorus compound of the general formula IV or V Image (IV) (V), where B the meanings stated above, R1 and R2 are as defined above and X? is a halide ion, in the presence of a base. The alpha,beta-substituted acroleins can be further processed to give hydroxymethyloxiranes.

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