Abstract
A nonenzymatic kinetic resolution of monoprotected BINOL and biphenol derivatives by atroposelective Si-O coupling with hydrosilanes is described. The reaction relies on a previously unprecedented Cu-H-catalyzed silylation of phenols. The catalyst system consisting of CuCl, (R,R)-Ph-BPE, and NaOtBu enables the enantioselective coupling of the phenolic hydroxy group with a hydrosilane with moderate to good selectivity factors.
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