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Conformational analysis of a novel tetraethylether of thiacalix[4]arene by means of NMR spectroscopy is presented. Equilibrium between three dominant conformers paco, 1,3-alt and cone exists in CDCl 3 solution at room temperature. Observed chemical exchange between conformers indicates higher internal flexibility of the title compound in comparison with similar methylene bridged analogues...
(3,5-Diphenyl-1-o-tolyl-1H-pyrrol-2-yl)phenylmethanone 3a and (1-naphthalen-1-yl-3,5-diphenyl-1H-pyrrol-2-yl)phenylmethanone 4a are atropisomeric and their LAH reductions afford mixtures of atropdiastereoisomeric (3,5-diphenyl-1-o-tolyl-1H-pyrrol-2-yl)- phenylmethanoles 3b,c and (1-naphthalen-1-yl-3,5-diphenyl-1H-pyrrol-2-yl)phenylmethanoles 4b,c, respectively.
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