Nickel-Catalyzed Thiolation and Selenylation of Cycloketone Oxime Esters with Thiosulfonate or Seleniumsulfonate
作者:Jian Li、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.9b02431
日期:2019.12.20
opening and, subsequently, reductive cross-coupling of cycloketone oxime esters with thiosulfonate or seleniumsulfonate are reported, which involves C-C bondcleavage and C(sp3)-S or C(sp3)-Se bond formation. Notably, S-aryl/alkyl sulfonothioates and Se-alkyl seleniumsulfonothioates could be employed in this reaction to afford a variety of 1° and 2° alkyl sulfides, aryl sulfides, and 1° and 2° alkyl selenides
Visible-Light-Promoted Cross-Coupling Reactions of 4-Alkyl-1,4-dihydropyridines with Thiosulfonate or Selenium Sulfonate: A Unified Approach to Sulfides, Selenides, and Sulfoxides
作者:Jian Li、Xin-Er Yang、Shan-Le Wang、Long-Long Zhang、Xiao-Zhou Zhou、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.orglett.0c01776
日期:2020.6.19
In this paper, a visible-light-promoted cross-coupling of 4-alkyl-1,4-dihydropyridines with thio-/selenium sulfonates under transition-metal-free conditions is described. This strategy features easily available substrates, mild reaction conditions, high yields, and high chemoselectivity. A novel synthetic route for the construction of a sulfide or selenide C-sp3-S or C-sp3-Se bond under transition-metal-free conditions without an additive oxidant or base is developed. This method is well extended to the synthesis of a class of thiolated or selenylated glycosides that has not been explored before. Sulfoxides were also successfully chemoselectively observed via a facile variation of the atmosphere under photocatalyzed conditions.