Copper(I)‐Catalyzed Regioselective Monoborylation of 1,3‐Enynes with an Internal Triple Bond: Selective Synthesis of 1,3‐Dienylboronates and 3‐Alkynylboronates
作者:Yusuke Sasaki、Yuko Horita、Chongmin Zhong、Masaya Sawamura、Hajime Ito
DOI:10.1002/anie.201007182
日期:2011.3.14
Hooray for hydroboration! The products afforded by the title reaction depend on the substitution pattern on the double bond moiety of 1,3‐enyne substrates (see scheme). These types of products, either 1,3‐dienylboronates or 3‐alkynylboronates, are difficult to obtain by other methods. Interestingly, ligand‐controlled borylation was observed with high selectivity in some cases. pin=pinacolato, THF=tetrahydrofuran
硼氢化硼的万岁!标题反应提供的产物取决于1,3-烯炔底物双键部分的取代方式(参见方案)。这些类型的产品(1,3-二烯基硼酸酯或3-炔基硼酸酯)很难通过其他方法获得。有趣的是,在某些情况下,以高选择性观察到配体控制的硼化作用。pin =频哪醇,THF =四氢呋喃。