Stereo- and\nEnantioselective Syntheses of (<i>Z</i>)‑1,3-Butadienyl-2-carbinols\nvia Brønsted Acid\nCatalysis

A Brønsted acid-catalyzed enantioselective synthesis\nof (<i>Z</i>)-1,3-butadienyl-2-carbinols is developed. By\nemploying\na chiral phosphoric acid as the catalyst, a variety of 1,3-butadienyl-2-carbinols\nwere obtained in good yields with excellent <i>Z</i>-selectivities\nand enantiopurities from α-alkyl-substituted homoallenyl boronates.