Phosphonium 1,3-bisylides boron-bridged

Dialkylboron-substituted phosphonium ylides have been prepared by reaction of dialkylchloroboranes with alkylidenephosphoranes (equation 50). The reaction of phosphonium ylides with alkyldichloro-boranes leads to the formation of boron-bridged 1,3-bisylides (equation 51). ... 

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