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Eine Nickel‐katalysierte asymmetrische Hydrierung von N‐Sulfonyliminen mit H2‐Gas als Wasserstoffquelle wurde mit hohen katalytischen Aktivitäten (S/C bis 10 500) und exzellenten Enantioselektivitäten (bis 99.7% ee) realisiert. Nickel‐Katalysatoren sind preiswerter als andere Übergangsmetallkatalysatoren (Rh, Ru, Ir, Pd usw.) und hoch attraktiv für die industrielle Produktion von chiralen Aminen....
An efficient nickel‐catalyzed asymmetric hydrogenation of N‐tBu‐sulfonyl imines was developed with excellent yields and enantioselectivities using (R,R)‐QuinoxP* as a chiral ligand. The use of a much lower catalyst loading (0.0095 mol %, S/C=10500) represents the highest catalytic activity for the Ni‐catalyzed asymmetric hydrogenations reported so far. Mechanistic studies suggest that a coordination...
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