G. Pabst, J. Sauer
Apr 16, 1999
Citations
0
Influential Citations
24
Citations
Journal
Tetrahedron
Abstract
Abstract 3,5-Di-(pyridin-2-yl)-[1,2,4]-triazines 3 are converted to 4-tributylstannyl-2,6-oligopyridines 5 regioselectively via [4+2] cycloadditions with ethynyltributyltin. Bromination of the tin compounds 5 leads to 4-bromo-2,6-oligopyridines 7 . Cross-coupling reactions of compounds 5 and 7 under Stille conditions yield branched oligopyridines 8 containing 8 to 14 pyridine units.