Synthesis and mesogenic properties of Schiff bases derived from aminopyrazoles

Authors
Claramunt, RM Forfar, I Cabildo, P Lafuente, J Barbera, J Gimenez, R Elguero, J
Citation
Rm. Claramunt et al., Synthesis and mesogenic properties of Schiff bases derived from aminopyrazoles, HETEROCYCLE, 51(4), 1999, pp. 751-762
Citations number
37
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
HETEROCYCLES
ISSN journal
03855414 → ACNP
Volume
51
Issue
4
Year of publication
1999
Pages
751 - 762
Database
ISI
SICI code
0385-5414(19990401)51:4<751:SAMPOS>2.0.ZU;2-T
Abstract
Fifteen azomethineimines derived from C-aminopyrazoles and aromatic aldehyd es have been prepared and fully characterized (IR, MS, H-1 and C-13 NMR in solution and C-13 CPMAS NMR). The benzaldehyde bearing at position 4 n-decy loxy or a n-butyloxycarbonylethyloxy substituents and at position 2 a hydro gen or a hydroxy substituent have been tested for mesogenic properties. Onl y 5 [1H-4-(4-n-decyloxy-2-hydroxybenzylideneaminopyrazole)] presents a meso genic behaviour (smectic A) on cooling.