Palladium-catalyzed cycloaddition of 1,3-butadiynes with water: An alternative efficient catalytic system for atom-economic synthesis of 2,5-disubstituted furans

An efficient Pd(PPh3)(4)/2,5-norbornadiene-catalyzed cycloaddition of 1,4-disubstituted 1,3-butadiynes with H2O under basic conditions for straightforward and simple synthesis of 2,5-disubstituted furans is described.