Alcohols with up to 19% enantiomeric excess were obtained on hydroboration/oxidation of representative prochiral olefins using N-isobornyl-N-methylaniline–borane or N-benzyl-N-isopropyl-α-methylbenzylamine–borane indicating that the Lewis base is present in the hydroboration transition state.
No takes yet. Share an insight, caveat, or question.
Narayana et al. (1987) studied this question.