Add time:07/13/2019 Source:sciencedirect.com
α-Phenylthio-α,β-alkenones (2), readily available by Pd(II)-catalysed coupling of (E)-1-phenylthio-1-tributylstannylhex-1-ene with the corresponding acid chlorides, have been treated with borane in the presence of phenylglycine- or proline-derived oxazaborolidines to afford 2-phenylthio-2-alken-1-ols (3) with good to excellent enantioselectivities. Ozonolysis of 3 provides a new and efficient route to chiral α-hydroxy thioesters 4.
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