variety of 2,3,4-trisubstituted furans are prepared by treatment of tantalum-alkyne complexes with a aldehydes followed by addition of an isocyanide in DME-PhH-THF (1:1:1). The regioselectivity of the reaction depends on the bulkiness of substituents on a acetylenes and the bulkier substituents tend to possess 4-position of the produced furans. 4-Trialkylsilyl-substitued furans are produced exclusively when