Facile synthesis of highly substituted 2-pyrone derivatives via a tandem Knoevenagel condensation/lactonization reaction of β-formyl-esters and 1,3-cyclohexadiones
作者:Firouz Matloubi Moghaddam、Zohreh Mirjafary、Marjan Jebeli Javan、Sara Motamen、Hamid Saeidian
DOI:10.1016/j.tetlet.2014.02.104
日期:2014.4
A mild and efficient tandem process for the synthesis of new highly substituted 2-pyrones starting from commercially available 2-arylacetic acids has been developed. The synthesis is based on the Knoevenagel condensation of 1,3-cyclohexadiones with various β-formyl-esters, followed by lactonization in the presence of nano ZnO (20 mol %). Moderate to high yields and readily available cheap starting
已经开发了一种温和而有效的串联方法,用于从可商购的2-芳基丙烯酸开始合成新的高度取代的2-吡喃酮。合成基于1,3-环己二酮与各种β-甲酰基酯的Knoevenagel缩合,然后在纳米ZnO(20 mol%)存在下进行内酯化。中高收率和容易获得的廉价原料是本方法的关键特征。