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. ... The catalyzed decomposition of ethyl diazoacetate in the presence of β-keto esters produces regioisomeric enol ethers and the diester from formal carbenoid insertion into the α-CH bond. The product distribution is very catalyst dependent. ... Equilibration does occur in ...