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Room for expansion: A versatile protocol for the synthesis of a new generation of strained cross-conjugated macrocycles (expanded radialenes) has been achieved. This method uses the Sonogashira cross-coupling reaction to prepare expanded radialenes, bisradialenes, and radiaannulenes. Preliminary electronic, redox, and structural characterization of the macrocycles are presented.
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Gholami et al. (2007) studied this question.
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