| 摘要 |
PCT No. PCT/JP90/01488 Sec. 371 Date Jul. 15, 1991 Sec. 102(e) Date Jul. 15, 1991 PCT Filed Nov. 15, 1990 PCT Pub. No. WO91/07371 PCT Pub. Date May 30, 1991.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 a s defined above) with acetone, in the presence as a catalyst of one or tow or more compounds selected from the group consisting of perhydroisoindole and pyrrolidine which may have substituents, in a water solvent, at 20 DEG C. to 40 DEG 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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