Abstract
New covalently linked at the lower rim double‐calix[4]arens, which have great potential for the synthesis of multicavity receptors, were prepared via Sonogashira cross‐coupling reaction. The structures of 6 and 7 were confirmed by NMR, MS, and elemental analysis.
Acknowledgment
Saeed Taghvaei‐Ganjali is grateful to the Research Council of the Islamic Azad University. Generous support from Prof. Dr. J. Ipaktschi, Institute of Organic Chemistry, Giessen University, is acknowledged.