C S and C N bond formation via Mn-promoted oxidative cascade reaction: Synthesis of C3-sulfenated indoles
作者:Lin He、Xianwei Li
DOI:10.1016/j.tet.2017.09.003
日期:2017.10
Thioethers are of synthetic value in pharmaceutical molecules and nature products, herein, we report an oxidative cascade reaction that delivers multiple substituted indole thioethers with great efficiency. This transformation utilized ortho-azido aromatic alkynes as the substrates, and sulfonyl hydrazides as the sulfenation reagent promoted by Mn(III) catalyst. Notably, great functional group tolerance
Visible-Light-Mediated Eosin Y Photoredox-Catalyzed Vicinal Thioamination of Alkynes: Radical Cascade Annulation Strategy for 2-Substituted-3-sulfenylindoles
作者:Shrikant D. Tambe、Rajendra S. Rohokale、Umesh A. Kshirsagar
DOI:10.1002/ejoc.201800287
日期:2018.5.15
An efficient, mild, and metal‐freeradical cascade annulation strategy for 2‐substituted‐3‐sulfenylindoles from 2‐alkynyl‐azidoarenes by vicinal thioamination of alkynes, catalyzed by a eosin Y photoredox catalyst mediated by visiblelight in the presence of air as mild oxidant.
A novel and efficient palladium-catalyzed cascade annulation/arylthiolation reaction has been developed to afford functionalized 3-sulfenylbenzofuran and 3-sulfenylindole derivatives in moderate to good yields from readily available 2-alkynylphenols and 2-alkynylamines in ionic liquids. This protocol provides a valuable synthetic tool for the assembly of a wide range of 3-sulfenylbenzofuran and 3-sulfenylindole
Base-mediated chalcogenoaminative annulation of 2-alkynylanilines for direct access to 3-sulfenyl/selenyl-1<i>H</i>-indoles
作者:Wei-Ching Chen、Rekha Bai、Wan-Lin Cheng、Chun-Yu Peng、Daggula Mallikarjuna Reddy、Satpal Singh Badsara、Chin-Fa Lee
DOI:10.1039/d3ob00279a
日期:——
An efficient and transition metal-free synthesis of 3-sulfenyl/selenyl-1H-indoles via a base-assisted chalcogenoaminative annulation of 2-alkynyl aniline with disulfides/diselenides is described. A series of 2-alkynylanilines were found compatible with dichalcogenides in this transformation providing 3-sulfenyl/selenyl-1H-indoles in good to excellent yields. The presented methodology has the advantages
描述了通过2-炔基苯胺与二硫化物/二硒化物的碱辅助硫族胺化环化,高效且无过渡金属的 3-sulfenyl/selenyl-1 H - indoles合成。发现一系列 2-炔基苯胺与二硫化物在该转化中相容,可提供 3-sulfenyl/selenyl-1 H -indoles,产率良好至极佳。所提出的方法具有易于获得的原材料、官能团耐受性以及提供获取 3-sulfenylindoles 和 3-selenylindoles 的广泛底物的优点。
Aniline-initiated and BrØnsted acid-catalyzed one-pot reaction toward 2-aryl-3-sulfenylindoles by using α-aminocarbonyl compounds and primary amines with RSSR