| 摘要 |
PURPOSE:To inhibit the polymerization loss of an alpha,beta-unsaturated aldehyde effectively and obtain the titled substance in high yield without troublesome operations in reacting a ketone with the alpha,beta-unsaturated aldehyde in the presence of a catalyst, by carrying out the reaction in the vapor phase without using the liquid phase. CONSTITUTION:A ketone of the formula R<1>CH<2>COCH2R<2> (R<1> and R<2> are H, CH3 or C2H5) is reacted with an alpha,beta-unsaturated aldehyde of the formula R<3>CH= CHCHO (R<3> is H, CH3 or C2H5) in the vapor phase in the presence of a solid basic catalyst, e.g. sodium hydroxide or potassium hydroxide, to give the aimed compound. The reaction temperature is in the range of 200-400 deg.C. The feeding rate of the raw materials is in the range of 0.001-1.0mol based on the alpha,beta- unsaturated aldehyde and 1g catalyst. |
