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. ... A novel rearrangement of 1-aryl-4-alkyl-2-butyn-1-one in the presence of Pd(dba) 2 -PPh 3 catalyst gave 2,4-substituted furans in moderate yields. ... Synthesis of 2,5-disubstituted furans via the reaction of butynones with palladium catalyst, and it is suggested that, by means of the ...