A novel methodology to access synthetically versatile vinylboronic esters through a ligand-controlled cobalt-catalyzed hydroboration of terminal and internal alkynes is reported. The approach relies on the in situ reduction of Co(II) by H-BPin in the presence of bisphosphine ligands generating catalytically active Co(I) hydride complexes. This procedure avoids the use of stoichiometric amounts of base
报道了一种通过
配体控制的
钴催化的末端和内部
炔烃的
硼氢化反应获得合成通用
乙烯基硼酸酯的新方法。该方法依赖于H-BPin 在双
膦配体存在下原位还原 Co(II),生成具有催化活性的 Co(I)
氢化物复合物。该程序避免使用
化学计量量的碱,并且不会产生含
硼副产物,这转化为高官能团耐受性和原子经济性。