Z-Selective Synthesis of Vinyl Boronates through Fe-Catalyzed Alkyl Radical Addition
作者:Guido Barzanò、Alexis Cheseaux、Xile Hu
DOI:10.1021/acs.orglett.8b03772
日期:2019.1.18
Z-Selective synthesis of vinyl boronates is challenging. This work describes Fe-catalyzed addition of alkyl radicals, formed by the corresponding alkyl halides, to ethynyl ethynylboronic acid pinacol ester that gives rise to Z-vinyl boronates in high stereoselectivity. The method works best for tertiary and secondary alkyl iodides. The Z-vinyl boronate products are easily converted to other Z-alkenes