| abstract |
PURPOSE: To prepare the title compound useful as an intermediate of perfume, medicines, pesticides, organic chemicals, etc., easily, by reacting an easily available benzene compound, an α,β-unsaturated aldehyde, and an acyl compound in the presence of a catalyst. n CONSTITUTION: A compound of formula (R 1 , 2 are H, 1W10C hydrocarbon, or together form a ring; R 3 is 1W20C hydrocarbon, fluoroalkyl, etc.; Z is H, etc.) is prepared by reacting a benzene compound (pref. t-butylbenzene or cumene), an α, β-unsaturated aldehyde (pref. acrolein, crotonaldehyde, etc.) and an acyl compound (pref. acetyl chloride) in the presence of Friedel-Crafts catalyst, at ≤50°C, pref. ≤10°C. The amount of the catlyst is pref. 1.0W1.5mol per 1mol of the α,β- unsaturated aldehyde. n COPYRIGHT: (C)1980,JPO&Japio |