An alternative efficiently Ru3(CO)12-catalyzed reductive cyclocarbonylation of alkynes affording substituted furan-2(5H)-ones

The efficient Ru3(CO)12-catalyzed reductive cyclocarbonylation of internal alkynes in the presence of water under the moderate CO pressure to afford 3,4-disubstituted furan-2(5H)-ones in good to excellent yields is described.