Selective reductions. 45. Asymmetric reduction of prochiral ketones by iso-2-methyl-, iso-2-ethyl-, and [iso-2-[2-(benzyloxy)ethyl]apopinocampheyl]-tert-butylchloroboranes. Evidence for a major influence of the steric requirements of the 2-substituent on the efficiency of asymmetric reduction

Reduction d'alcanones, d'(alkyl cyclohexyl) cetones, de l'acetophenone et de la cyclohexene-2one