A new member of the calix[4]crown family: Facile synthesis and characterization of a calix[4]crown-9 cone conformer
2009
Abstract 25,27-Dipropoxy- p - tert -butylcalix[4]crown-9 cone conformer 5 was readily synthesized via an intramolecular cyclization strategy in good yields. The structures of all the new compounds involved were confirmed by NMR, ESI-MS and elemental analyses. All of them were proved to be in the cone conformation.
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