Formation of (Z)-allylboronates via ruthenium-catalysed hydroboration of propargyl ethers with pinacolborane

Abstract
Hydroboration of propargyl ethers with pinacolborane in the presence of a catalytic amount of RuHCl(CO)(PPh3)3 involved a carbon-carbon double bond isomerisation to afford γ-alkoxyallylboronate, predominantly in the Z form, in good yields.

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