Sj. Tu et al., The synthesis of novel substituted 2,5-dioxo-1,2,3,4,5,6,7,8-octahydroquinolines without solvent under microwave irradiation, SYN COMMUN, 31(17), 2001, pp. 2657-2661
A convenient synthetic method for substituted 2,5-dioxo-1,2,3,4,5,6,7,8-oct
ahydroquinolines is described. Heating Meldrum's acid, dimedone, ammonium a
cetate and different aromatic aldehydes without a solvent in a microwave ir
radiation for 2-5 minutes affords 4 in 72-86% yield. The structure of these
compounds has been thoroughly studied by x-ray crystallographic analysis.