Catalyst-Free Dearomative\nAllylboration of Ketones\nwith Benzo[<i>b</i>]thiophenylmethyl Boronic Acids

A novel approach to the dearomative allylboration of\nketones with\nbenzo[<i>b</i>]thiophenylmethyl boronic acids has been developed.\nBy leveraging the inherent reactivity of the boronic acid unit, this\nprocess occurs under mild reaction conditions without the need for\na catalyst, leading to the efficient formation of homoallylic tertiary\nalcohols accompanied by the construction of three-dimensional sulfur-containing\nalicyclic scaffolds in high yields with excellent stereoselectivities.