Aerobic copper-catalyzed synthesis of (E)-alkenyl sulfones and (E)-β-halo-alkenyl sulfones via addition of sodium sulfinates to alkynes
作者:Nobukazu Taniguchi
DOI:10.1016/j.tet.2014.01.071
日期:2014.3
(E)-alkenyl sulfones. When a CuCl catalyst was employed, the hydrosulfonylation proceeded syn-selectively, and (E)-alkenyl sulfones were synthesized in excellent yields. In contrast, the reaction using CuI catalyst produced (E)-β-haloalkenyl sulfones anti-selectively in the presence of potassium halides. Furthermore, the (E)-β-bromoalkenyl sulfones are possible to convert into various alkenyl sulfones by Suzuki–Miyaura
在空气中使用亚磺酸钠在铜上催化炔烃的磺酰化反应,可生成区域选择性和立体选择性的(E)烯基砜。当使用CuCl催化剂时,加氢磺酰化进行顺选择性地进行,并且以优异的产率合成了(E)-链烯基砜。相反,在卤化钾的存在下,使用CuI催化剂的反应反选择性地产生了(E)-β-卤代烯基砜。此外,(E)-β-溴烯基砜有可能通过Suzuki-Miyaura偶联转化为各种烯基砜。