G. Pabst, Oliver C. Pfu¨ller, J. Sauer
Nov 26, 1998
Citations
0
Influential Citations
29
Citations
Journal
Tetrahedron Letters
Abstract
Abstract The condensation of 1,10-phenanthroline-5,6-dione1 with amidrazones2 leads to 6-hetaryl-substituted 1,2,4,8,9-pentaazatriphenylenes3. These condensed 1,2,4-triazines can be easily transformed to pyridines by [4+2] cycloaddition with norborna-2,5-diene followed by [4+2] cycloreversions of nitrogen and cyclopentadiene. This reaction sequence offers a new, simple and general access to 6-oligopyridyl-1,5,12-triazatriphenylenes4.