Synthesis of furan derivatives using the reaction of 1,3-dicarbonyl compounds with various α-haloketones

The reaction of 1,3-dicarbonyl compounds with ethyl bromopyruvate thus led to dihydrofurans in good yields. Dihydrofurans were converted to the corresponding furan derivatives in the presence of p-toluenesulfonic acid (p-TSA). While, the reaction of phenacyl bromides with 1, 3-dicarbonyl compounds led to either esters or α-substituted acetophenones in moderate yields.