1.
Chem Commun (Camb)
; 51(20): 4227-30, 2015 Mar 11.
Article
in English
| MEDLINE
| ID: mdl-25670155
ABSTRACT
Direct disubstitution at the methylene bridges of p-tert-butylcalix[6]arenemethyl ether has been achieved for the first time using a lithiation-substitution protocol. Two stable conformers have been isolated using column chromatography, and their structures have been unambiguously confirmed from 1D, 2D and variable temperature NMR studies and single crystal X-ray structure analysis.