Regioselective Catalytic Hydroboration of Propargylic Species Using Cu(I)-NHC Complexes

[摘要]：The catalytic regioselective hydroboration of propargylic alcohols and ethers was investigated using NHC-CuCl. We observe that different NHC-CuCl complexes catalyze hydroborations of propargylic substrates with opposite regioselectivity. A 6-NHC-CuCl complex provides alpha-selectivity whereas beta-selectivity is achieved using a 5-NHC-CuCl complex. The reaction tolerates a wide range of functional groups.

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