Abstract
Tough nut to crack: Chiral bidentate N-heterocyclic carbene copper complexes were designed that promote enantioselective hydroborations of one of the most difficult substrate classes: acyclic and exocyclic 1,1-disubstituted alkenes undergo reaction with >98 % site selectivity, in up to >98 % yield and e.r=96.5:3.5 (see scheme, B2(pin)2 = bis(pinacolato)diboron).
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