NEW MACROCYCLIC POLYAMINES OF 3,5-DISUBSTITUTED 1H-PYRAZOLE - A C-13 NMR-STUDY OF DEPROTONATION AND FORMATION OF ZN2+ DINUCLEAR COMPLEXES

Authors
KUMAR M ARAN VJ NAVARRO P
Citation
M. Kumar et al., NEW MACROCYCLIC POLYAMINES OF 3,5-DISUBSTITUTED 1H-PYRAZOLE - A C-13 NMR-STUDY OF DEPROTONATION AND FORMATION OF ZN2+ DINUCLEAR COMPLEXES, Tetrahedron letters, 34(19), 1993, pp. 3159-3162
Citations number
19
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
34
Issue
19
Year of publication
1993
Pages
3159 - 3162
Database
ISI
SICI code
0040-4039(1993)34:19<3159:NMPO31>2.0.ZU;2-C
Abstract
Dipodal (2+2) condensation of 3,5-(1H-pyrazole)dicarbaldehyde (3) with 1,5-diamino-3-oxapentane (4) and diethylerketriamine (5) followed by hydrogenation of the resulting Schiff bases (6 and 8), affords two new 26 membered polyaza macrocycles of 1H-pyrazole (7 and 9). The deproto nation of both crowns in basic medium as well as the formation of dinu clear Zn2+ complexes (7b and 9b) from the dipyrazolate salts 7a and 9a have been studied by C-13 NMR.