THE NEW AND SIMPLE LEGO SYSTEM - ITS APPLICATION TO THE SYNTHESIS OF SUPERBRANCHED OLIGOPYRIDINES

Authors
PABST GR SAUER J
Citation
Gr. Pabst et J. Sauer, THE NEW AND SIMPLE LEGO SYSTEM - ITS APPLICATION TO THE SYNTHESIS OF SUPERBRANCHED OLIGOPYRIDINES, Tetrahedron letters, 39(48), 1998, pp. 8817-8820
Citations number
11
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
39
Issue
48
Year of publication
1998
Pages
8817 - 8820
Database
ISI
SICI code
0040-4039(1998)39:48<8817:TNASLS>2.0.ZU;2-R
Abstract
The condensation of pyridine-2, 4,6-tricarboxtrisamidrazone 1 with 1,2 -dicarbonyl compounds 2 - 3 leads to trisubstituted 1,2,4-triazines 4 - 6. These 1,2,4-triazines can be easily transformed to superbranched pyridines 7 - 9 by [4+2] cycloaddition with norborna-2,5-diene followe d by [4+2] cycloreversions of nitrogen and cyclopentadiene. This react ion sequence offers a new, simple and general access to superbranched oligopyridines. (C) 1998 Elsevier Science Ltd. All rights reserved.