Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Aromatic 1,3-dicarbonyl compounds react with not enolizable aldehydes in the presence of C 2 H 5 MgBr or AlCl 3 affording 2-carbethoxy- and 2-acetyl-1-indanones via tandem Knoevenagel condensation-cycloalkylation process. ... The use of hard Lewis acids such as AlCl 3 , ...