Photocatalytic Thio/Selenosulfonylation–Bicyclization of Indole-Tethered 1,6-Enynes Leading to Substituted Benzo[<i>c</i>]pyrrolo[1,2,3-<i>lm</i>]carbazoles
作者:Hang-Dong Zuo、Xi Chen、Yue Zhang、Jian-Wu Liu、Sheng-Hu Yan、Guigen Li、Jia-Yin Wang
DOI:10.1021/acs.orglett.4c00981
日期:——
The photocatalyzed radical-triggered thio/selenosulfonylation–bicyclization of indole-tethered 1,6-enynes has been established for the first time, enabling the synthesis of various previously unreported thio/selenosulfonylated benzo[c]pyrrolo[1,2,3-lm]carbazoles with moderate to good yields under mild conditions. The reaction pathway was proposed, consisting of energy transfer, homolytic cleavage,
首次建立了吲哚束缚的1,6-烯炔的光催化自由基触发硫代/硒磺酰化-双环化反应,从而能够合成各种以前未报道的硫代/硒磺酰化苯并[ c ]吡咯并[1,2,3- lm] ]咔唑在温和条件下具有中等至良好的产率。提出了反应途径,包括能量转移、均裂、自由基加成、5- exo - dig 、自由基偶联和马洛里反应级联。该方法表现出广泛的底物兼容性和对各种官能团的优异耐受性,其特点是在成键和成环方面具有显着的效率。