Silver-Catalyzed <i>anti</i>-Markovnikov Hydroboration of C–C Multiple Bonds
作者:Yan Wang、Rui Guan、Paramasivam Sivaguru、Xuefeng Cong、Xihe Bi
DOI:10.1021/acs.orglett.9b01217
日期:2019.6.7
simple silver salt (AgOAc)-catalyzed anti-Markovnikov-selective hydroboration of alkenes, 1,3-dienes, and alkynes with pinacolborane (HBpin) has been described. This strategy provides an efficient and practical method to access various alkyl-, allyl-, and (E)-alkenylboronate esters in good to excellent yields with regio- and stereoselectivity under ligand- and base-free conditions.
A novel example of the Suzuki-Miyaura cross-coupling reaction between sp(3)-carbon and sp(3)-carbon is described. The reaction of a diborylmethane derivative with allyl halides or benzyl halides proceeded efficiently in the presence of appropriate Pd-catalysts at room temperature. The present approaches provide functionalized homoallylboronates and alkylboronates with excellent regio- and chemoselectivities.