Enantioselective Reductive Coupling of Imines Templated by Chiral Diboron

We herein report a general, practical,
and highly efficient method
for asymmetric synthesis of a wide range of chiral vicinal diamines
via reductive coupling of imines templated by chiral diboron. The
protocol features high enantio­selectivity and stereo­specificity,
mild reaction conditions, simple operating procedures, use of readily
available starting materials, and a broad substrate scope. The method
signifies the generality of diboron-enabled [3,3]-sigma­tropic
rearrangement.