Synthesis of quinolines and fused pyridocoumarins from N-propargylanilines or propargylaminocoumarins by catalysis with gold nanoparticles supported on TiO2

Article abstract of DOI:10.1016/j.tet.2013.04.026

[5,6]-Fused pyridocoumarins are prepared under mild conditions in excellent yields through the activation of the triple bond of 6-propargylaminocoumarins by gold nanoparticles supported on TiO₂. The analogous reaction of N-propargylanilines with Au/TiO₂ or Au/Al₂O₃ resulted in the formation of quinolines.