Synthesis of two 1,3-2,4-calix[4]bis-crown ethers containing two 1,2-phenylene and one pyridine or anisole units in each crown ether moiety

✍ Scribed by Guo-Ping Xue; Jerald S. Bradshaw; Ning Su; Krzysztof E. Krakowiak; Paul B. Savage; Reed M. Izatt

• Publisher: Journal of Heterocyclic Chemistry
• Year: 2000
• Tongue: English
• Weight: 214 KB
• Volume: 37
• Category: Article
• ISSN: 0022-152X
• DOI: 10.1002/jhet.5570370101

✦ Synopsis

Abstract

Syntheses of 1,3–2,4‐calix[4]bis‐crown ethers (1 and 2) fixed in the 1,3‐alternate conformation by 1,3‐ and 2,4‐bridges made of two modified polyether chains each containing two 1,2‐phenylene residues and one pyridine or anisyl unit are reported. The structures of compounds 1 and 2 were established by ^1^H nmr, ^13^C nmr, hrms and elemental analyses.