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A facile and efficient copper(I)‐catalyzed intermolecular direct CH homocoupling of imidazo[1,2‐a]pyridines with excellent C‐3 regioselectivity in dimethyl sulfoxide (DMSO) has been developed. This transformation provides a straightforward and operationally simple route for the preparation of biimidazo[1,2‐a]pyridines which are an important structural motif in natural products and pharmaceuticals. magnified image
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Lei et al. (2015) studied this question.
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