SYNTHESIS AND BASICITY OF 2,6-DI-[2-(HETEROARYL)VINYL]PYRIDINES

Authors
BALLISTRERI A GREGOLI L MUSUMARRA G SPALLETTI A
Citation
A. Ballistreri et al., SYNTHESIS AND BASICITY OF 2,6-DI-[2-(HETEROARYL)VINYL]PYRIDINES, Tetrahedron, 54(33), 1998, pp. 9721-9730
Citations number
13
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
54
Issue
33
Year of publication
1998
Pages
9721 - 9730
Database
ISI
SICI code
0040-4020(1998)54:33<9721:SABO2>2.0.ZU;2-#
Abstract
The synthesis and spectroscopic characterization of 2,6-di-[2-(heteroa lyl)vinyl]pyridines (heteroaryl = 2-furyl, 2-thienyl, 2-pyridyl, 2-thi azolyl) is reported. The pKa of the above pyridine derivatives measure d spectrophotometrically are coincident with those measured spectroflu orimetrically, indicating no acid-base re-equilibration in the excited state. NMR spectroscopy provides evidence for the central pyridine ri ng nitrogen as the site of first protonation in the tri-pyridine deriv ative. (C) 1998 Elsevier Science Ltd. All rights reserved.