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
Simple Indole Synthesis by One-Pot Sonogashira Coupling-NaOH-Mediated Cyclization
作者:Roberto Sanz、Verónica Guilarte、M. Castroviejo
DOI:10.1055/s-0028-1083624
日期:2008.12
Coupling of o-iodoanilines with terminal alkynes under standard Sonogashira conditions, and further treatment with NaOH under conventional heating or microwave irradiation, afford 2-substituted indoles in usually high yields. Functionalities such as halides, nitro, and cyano groups are tolerated under the reaction conditions.
Synthesis of Polysubstituted 3-Chalcogenated Indoles through Copper(I) Iodide-Catalyzed Three-Component Domino Reactions
作者:Feng Liu、Rui Gou、Yi Zhang、Sheng-wei Wu
DOI:10.1055/s-0037-1611691
日期:2019.1
Polysubstituted 3-chalcogenated indoles were synthesized by a three-component, one-pot, dominoreaction of a N-(2-bromophenyl)trifluoroacetamide, a 1-alkyne, a disulfides or diselenides, CuI, and proline in DMF. In this process, tandem Sonogashira coupling, N-cyclization, and sulfenyl/selenyl electrophilic substitution occurred sequentially and smoothly to form the anticipated products in good to excellent
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。