Unsymmetrical calix[4]-bis-crowns-6 with unequivalent crown loops.

Authors
Asfari, Z Thuery, P Nierlich, M Vicens, J
Citation
Z. Asfari et al., Unsymmetrical calix[4]-bis-crowns-6 with unequivalent crown loops., TETRAHEDR L, 40(3), 1999, pp. 499-502
Citations number
10
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
TETRAHEDRON LETTERS
ISSN journal
00404039 → ACNP
Volume
40
Issue
3
Year of publication
1999
Pages
499 - 502
Database
ISI
SICI code
0040-4039(19990115)40:3<499:UCWUCL>2.0.ZU;2-0
Abstract
Base-catalysed reactions of calix[4]crown-6 with suitable ditosylates produ ced unsymmetrical calix[4]-bis-crowns-6 1 and 2. Cesium ion preferred to bi nd the polyether loop substituted by 1,2-phenylene or 2,3-naphthylene group s as evidenced by X-ray structure. (C) 1998 Elsevier Science Ltd. All right s reserved.