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. ... Enolates of 1,3-dicarbonyl compounds 1 add in a [3+2] manner to methyl α-bromoacrylate 2 to furnish hydrofuran derivatives 3 or 4 in the presence of DBU in THF. ... Cookies are used by this site. To decline or learn more, visit our Cookies page.