A broad range of tertiary propargylic alcohols were kinetically resolved by catalyst-controlled enantioselective silylation. This non-enzymatic kinetic resolution is catalyzed by a Cu-H species and makes use of the commercially available precatalyst MesCu/(R,R)-Ph-BPE and a simple hydrosilane as the resolving reagent. Both alkyl,aryl- as well as dialkyl-substituted propargylic alcohols participate, and especially high selectivity factors are achieved when the alkyne terminus carries a TIPS group, which also enables facile post-functionalization in this position (s up to 207).
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