Silica sulfuric acid (SSA) was firstly used as an efficient catalyst to promote the synthesis of rctt configurational
calixresorcinarenes via one-pot condensation between resorcinol and aromatic aldehydes. The structure of 4-
cyanophenyl-calixresorcinarene (3b) has been determined by single crystal X-ray diffraction.
Keywords: Silica sulfuric acid, Calixresorcinarenes.
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