The pinacol of ligands: The (R)‐DTBM‐Segphos coordinated copper(I) complex was found to be very effective for the asymmetrichydroboration of β‐substituted styrene derivatives with pinacolborane (see scheme; DTBM=3,5‐di‐tert‐butyl‐4‐methoxyphenyl). This new method affords benzylic pinacol boronate esters with excellent levels of regio‐ and enantioselectivity (>99 %).