Akihito Yashiro, Keita Onodera, Chunlei Li
Jan 2, 2014
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Journal
Supramolecular Chemistry
Abstract
A phloroacetophenon[4]arene (3) consisting of four isomers was synthesised for the first time via the condensation of phloroacetophenone and benzaldehyde in a one-pot reaction with refluxing toluene in the presence of catalytic amounts of TsOH·H2O for a maximum yield of 64%. The conformational elucidation of four isomers (3a–d) by 1H NMR spectroscopy and X-ray crystal structure analysis showed them to be cone, partial cone, 1,3-alternate and 1,2-alternate types of conformations, respectively.