ω-(4-Bromophenyl) alkanoic acids 2c–e were obtained from 1-bromo-4-alkenylbenzenes 5c– e by hydroboration–thermal isomerization–oxidation. Their esters 11c–e were transformed in good yields into the corresponding boronates 12c–e by the cross-coupling reaction with 4, 4, 5, 5, 4′, 4′, 5′, 5′-octamethyl [2, 2′] bi [[1, 3, 2] dioxaborolanyl](10) in an ionic liquid,[bmim][BF4]. The use of pinacolborane for the coupling reaction in the ionic liquid ...
![1-bromo-4-[(E)-prop-1-enyl]benzene结构式](https://image.chemsrc.com/caspic/280/4489-23-0.png)
