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
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
An efficient synthesis of 2-bromo(chloro)-3-selenyl(sulfenyl)indoles via tandem reactions of 2-(gem-dibromo(chloro)vinyl)anilines with diselenides(disulfides)
作者:Jie Liu、Pinhua Li、Wei Chen、Lei Wang
DOI:10.1039/c2cc34800d
日期:——
A novel and efficient synthesis of 2-bromo(chloro)-3-selenyl(sulfenyl)indoles through tandem reactions of 2-(gem-dibromo(chloro)vinyl)-N-methylsulfonylanilines with diselenides and disulfides in the presence of t-BuOLi and I2 (10 mol%) in DMSO was developed. The reactions generated the desired products in good yields with high regio-selectivity under transition-metal-free conditions in one-pot.