Synthesis and characterization of dibenzo-18-crown-6 ethers with appended Schiff bases

Authors
Sousa, C Borges, JE Freire, C Romao, C Castro, B
Citation
C. Sousa et al., Synthesis and characterization of dibenzo-18-crown-6 ethers with appended Schiff bases, HETEROCYC C, 6(4), 2000, pp. 323-326
Citations number
16
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
HETEROCYCLIC COMMUNICATIONS
ISSN journal
07930283 → ACNP
Volume
6
Issue
4
Year of publication
2000
Pages
323 - 326
Database
ISI
SICI code
0793-0283(2000)6:4<323:SACODE>2.0.ZU;2-4
Abstract
New derivatives of dibenzo-18-crown-6 ether with two appended N2O2 tetraden tate Schiff bases were prepared by a multistep procedure which involved the preparation of tetranitro derivative of dibenzo-18-crown-6 in acetic media , their reduction by direct hydrogenation to the tetraamino derivative and finally Schiff condensation with salicylaldehyde and o-vanillin in dry meth anol:acetonitrile.