【摘要】 对KF/Al2 O3催化洋茉莉醛和丙醛进行Claisen -Schmidt缩合反应合成 2 -甲基 - 3 - (3 ,4-亚甲二氧基苯基 )丙烯醛进行了研究 ,结果表明KF/Al2 O3是较好的催化剂。通过正交实验确定了适宜的工艺条件 :洋茉莉醛∶丙醛为 0 .3∶0 .42 (摩尔比 ) ,1 4g催化剂 ,丙醛滴加时间 2h ,反应温度 60～ 70℃ ,反应时间 2h。平均摩尔收率为 80 .2 %。更多还原

【Abstract】 Methyl-3-(3,4-methylenedioxyphenyl)acraldehyde was synthesized through Claisen-Schmidt condensation reaction of the heliotropin and propanal over a KF/Al 2O 3 catalyst. The results indicate that the KF/Al 2O 3 catalyst is one of the best catalysts for the Claisen-Schmidt condensation. Adaptive technological conditions have been determined by experiment. The yield of parallel experiment was 80.2% under the reaction conditions which are 60～70?℃, 0.3 mol heliotropin and 0.42 mol propanal as reactants, 14?g KF/Al 2O 3 catalyst, the feeding time of propanal 2?h, reaction time 2 h.更多还原