A highly efficient sulfonylation of thiols has been achieved through the metal-free NaI/TBHP-mediated cross-coupling of sulfonyl hydrazides and thiols at roomtemperature. This method provides a convenient and practical route to thiosulfonates in 84–99% yields (39 examples) with wide functional group compatibility.
We describe herein a catalyst-free selective C−H sulfenylation of imidazo[1,2-a]pyridines using sulfonothioates as odorless source of thioarylated reagent in an aqueous medium. The method works for a variety of substitutedimidazo[1,2-a]pyridines with broad functional group tolerance. The methodology has been extends to selective sulfernylation of indoles and imidazothiazoles. The sulfonothioates are
Copper-Catalyzed Intermolecular Reductive Radical Difluoroalkylation–Thiolation of Aryl Alkenes
作者:Weiguang Kong、Changjiang Yu、Hejun An、Qiuling Song
DOI:10.1021/acs.orglett.8b02091
日期:2018.8.17
A novel radical-involved alkene difunctionalization catalyzed by the copper/B2pin2 system has been developed, leading to the difluoroalkylation–thiolation of aryl alkenes. The use of B2pin2 as an organic reductant enables the simultaneous installation of a C(sp3)–C(F2R) bond and a C(sp3)–S(R) bond across the C═C bond of aryl alkenes by utilizing two electrophilic reactants. The reaction exhibits broad
Visible-light-induced thiotrifluoromethylation of terminal alkenes with sodium triflinate and benzenesulfonothioates
作者:Weiguang Kong、Hejun An、Qiuling Song
DOI:10.1039/c7cc03520a
日期:——
An unconventional reductive quenching cycle was developed to realize the visible-light-induced thiotrifluoromethylation of terminalalkenes. CF3SO2Na was used as an easy to handle CF3 radical source to afford the desired products in moderate to good yields. Mild reaction conditions and a broad substrate scope feature in this transformation.
开发了非常规的还原淬灭循环以实现可见光诱导的末端烯烃的硫代三氟甲基化。CF 3 SO 2 Na用作易于处理的CF 3自由基源,以中等至良好的产率提供所需的产物。这种转化具有温和的反应条件和广泛的底物范围。
Copper(I)-Catalyzed Interrupted Click Reaction: Synthesis of Diverse 5-Hetero-Functionalized Triazoles
The 5‐heterofunctionalized triazoles are important scaffolds in bioactive compounds, but current clickreactions (CuAAC) cannot produce these core structures. A copper(I)‐catalyzed interruptedclickreaction to access diverse 5‐functionalized triazoles is reported. Various 5‐amino‐, thio‐, and selenotriazoles were readily assembled in one step in high yields. The reaction proceeds under mild conditions