Method for the preparation of .alpha.,.beta.-unsaturated...

Details Method for the preparation of .alpha.,.beta.-unsaturated... Method for the preparation of .alpha.,.beta.-unsaturated...

C - Chemistry, Metallurgy

07

C

C07C 45/72 (2006.01) C07C 45/74 (2006.01) C07C 49/217 (2006.01) C07C 221/00 (2006.01) C07C 225/22 (2006.01) C07D 213/50 (2006.01)

Patent

CA 2044603

Abstract The present invention relates to a method for the preparation of .alpha.,.beta.-unsaturated ketones represented by general formula (II) Image (II) (where R is a heterocyclic group with nitrogen atom in the ring or a phenyl group with electron donative substituents) which comprises reacting aldehydes represented by general formula (I) RCHO (I) (where R is as defined above) with acetone. in the presence as a catalyst of one or two or more compounds selected from the group consisting of perhydroisoindole and pyrrolidine which may have substituents, in a water solvent. at 20°C to 40°C, and then reacting at the reflux temperature. The compound (II) is extremely important as an intermediate for pharmaceuticals and agricultural chemicals.

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