Dynamic Resolution of Secondary Phosphine Boranes

Wolfe and Livinghouse reported a powerful method for resolution of the racemic tert-butylphenylphosphine borane (21) via deprotonation in the 

The sense of the asymmetric induction was determined by analysing the known monophosphine 23 with R = Me and was independently confirmed by the determination of the crystal structure of the adduct 22, which was 

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