Catalytic co-cyclisation of α,ω-cyanoalkynes with alkynes: a versatile chemo- and regio-selective synthesis of 2,3-substituted 5,6,7,8-tetrahydroquinolines and other cycloalka[1,2-b]pyridines
Abstract
α,ω-Cyanoalkynes are catalytically cocylised with alkynes in the presence of dicarbonyl(cyclopentadiecyl)-cobalt to furnish [b]annuiated pyridines chemo- and regio-selectively.