Alkene <i>versus</i> alkyne reactivity in unactivated 1,6-enynes: regio- and chemoselective radical cyclization with chalcogens under metal- and oxidant-free conditions
作者:Mohana Reddy Mutra、Vishal Suresh Kudale、Jing Li、Wu-Hsun Tsai、Jeh-Jeng Wang
DOI:10.1039/d0gc00321b
日期:——
light-promoted alkene vs. alkyne regio- and chemoselective radical cascade cyclization of electronically unbiased 1,6-enynes with chalcogens to synthesize substituted pyrrolidines bearing chalcogens. The reaction generated three new bonds, namely, C–SO2, C–C, and C–Se under extremely mild conditions. Furthermore, we achieved regio- and chemoselective mono-addition of aromatic thiophenols with unactivated 1,6-enynes
在这里,我们已经开发了无金属和无氧化剂的可见光促进的烯烃与炔烃的区域结合和化学选择性的自由基级联环化反应,将电子无偏的1,6-烯炔与硫族元素合成具有硫族元素的取代吡咯烷。该反应在极温和的条件下产生了三个新的键,即C–SO 2,CC和C–Se。此外,我们实现了芳香族苯酚与未活化的1,6-炔烃的区域和化学选择性单加成。该协议的关键特征是广泛的底物范围,环境友好的条件,操作简便,原子经济以及对克级合成的适应性。机理研究证实了反应是通过自由基途径进行的。