Condensation of aromatic aldehydes with N,N-dimethylacetamide in presence of dialkyl carbonates as dehydrating agents
作者:Tomáš Weidlich、Lubomír Prokeš、Aleš Růžička、Zdeňka Padělková
DOI:10.1007/s00706-009-0248-x
日期:2010.2
AbstractReactions of benzaldehydes with excess N,N-dimethylacetamide at 140 °C in the presence of diethyl carbonate as dehydrating agent and a base gave (E)-N,N-dimethylcinnamamides in good yields. If hydroxybenzaldehydes are used as substrates the reaction is accompanied by alkylation. Graphical abstract
摘要在碳酸二乙酯作为脱水剂和碱的存在下,苯甲醛与过量的N,N-二甲基乙酰胺在140°C下反应,得到高收率的(E)-N,N-二甲基肉桂酰胺。如果将羟基苯甲醛用作底物,则反应伴随烷基化。 图形概要