Neat and tidy: B(C6F5)3 efficiently converts a series of bis(alkynyl)phosphanes into highly substituted 3-borylphospholes through a twofold 1,1-carboboration reaction sequence. The boron substituted phospholes were also used as substrates in Suzuki–Miyaura type cross-coupling reactions (see scheme).
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Möbus et al. (2012) studied this question.
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