摘要 : Metal carbonate-catalyzed reactions of CH-acids(diethyl malonate,ethyl acetoacetate,ethyl cyanoacetate,and ethyl 2-acetyl-and 2-ethoxycarbonyl-5,9-dimethyldeca-4,8-dienoates)with alpha,beta-unsaturated aldehydes(acrolein,crotonald... 展开 Metal carbonate-catalyzed reactions of CH-acids(diethyl malonate,ethyl acetoacetate,ethyl cyanoacetate,and ethyl 2-acetyl-and 2-ethoxycarbonyl-5,9-dimethyldeca-4,8-dienoates)with alpha,beta-unsaturated aldehydes(acrolein,crotonaldehyde,citral)were studied in an ionic liquid,l-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF_6],and in a l-butyl-3-methylimidazolium bromide([bmim] [Br])-benzene system.The reactions with acrolein and crotonaldehyde afforded Michael addition products,those with citral resulted in Knoevenagel addition products.Sonication increased the yields of the Michael adducts.The ionic liquid [bmim][PF_6] can be recovered and repeatedly used in the reactions. 收起