Easily available 3,4-dibromo-2(5H)-furanone undergoes regioselective pallad
ium-catalyzed reaction with aryl(trialkyl)stannanes to give the correspondi
ng 4-aryl-3-bromo-2(5H)-furanones in satisfactory yields. These monobromo d
erivatives have proven to be useful precursors to unsymmetrical 3,4-diaryl-
2(5H)-furanones, 4-aryl-3-methyl-2(5H)-furanones and 4-aryl-2(5H)-furanones
.