| 摘要 |
A compound represented by the general formula WHEREIN X and Y each represent an electron attracting group and Z represents a hydrogen atom, a mono-valent hydrocarbon radical, a di-valent hydrocarbon radical bonded to X or Y, or an alkadienyl radical represented by the formula -CH2-CH=CH-CH2CH2CH2CH=CH2 or alkyl-substituted derivatives thereof, and a process for preparing said compounds by adding a 1,3-diene to an active methylene compound or hydrocarbon-substituted methylene compound having the electron attracting groups X and Y as represented by the general formula X - CH(Z) - Y, wherein X, Y and Z have the same meaning as above, using a palladium compound or a platinum compound as catalyst.
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