One-pot synthesis of chiral β-hydroxysulfones from alkynes <i>via</i> aerobic oxysulfonylation and asymmetric reduction in MeOH/H<sub>2</sub>O
作者:Peng Cui、Qixing Liu、Juan Wang、Huan Liu、Haifeng Zhou
DOI:10.1039/c8gc03671c
日期:——
β-hydroxysulfones from inexpensive and readily available terminal alkynes and sodium sulfinates via a consecutive one-pot reaction in an aqueous medium under mild conditions is described. The intermediates, β-keto sulfones, generated from an aerobic oxysulfonylation of terminal alkynes and sodium sulfinates catalyzed by an iron salt in MeOH/H2O (v : v = 3 : 1) at 50 °C, were subsequently reduced by a
描述了在温和条件下在水性介质中通过连续的一锅反应由廉价且容易获得的末端炔烃和亚磺酸钠高度对映选择性合成β-羟基砜的方法。随后在50°C下由铁盐在MeOH / H 2 O(v:v = 3:1)中催化的末端炔烃和亚磺酸钠的需氧氧磺酰化反应生成的中间体β-酮砜HCOONa作为氢源的催化不对称转移加氢反应。以高收率和高达99.9%ee值获得了各种手性β-羟基砜。这种一锅法工艺很容易按比例放大以进行克级合成。