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. ... Cyclic β-ketoesters and β-ketoamides are converted to 2-(carbalkoxy)- and 2-(aminocarbonyl)-2-cycloalken-1-ones by treatment with Pb(OAc) 4 and Cu(OAc) 2 in benzene. ... Cyclic β-ketoesters and β-ketoamides are converted to 2-(carbalkoxy)-and 2-( ...