Dearomatization of Indoles via Azido Radical Addition and Dioxygen Trapping To Access 2-Azidoindolin-3-ols
摘要:
Efficient copper-catalyzed aerobic oxidative dearomatization of indoles with trimethylsilyl azide (TMSN3) for the synthesis of 2-azidoindolin-3-ols has been developed. Molecular oxygen served as the oxygen-atom source in this transformation. The multicomponent reaction is appreciated by its high site- and diastereoselectivity, broad substrate scope, and mild conditions at room temperature.
Palladium(0)-Catalyzed Dearomative [3 + 2] Cycloaddition of 3-Nitroindoles with Vinylcyclopropanes: An Entry to Stereodefined 2,3-Fused Cyclopentannulated Indoline Derivatives
作者:Maxime Laugeois、Johanne Ling、Charlène Férard、Véronique Michelet、Virginie Ratovelomanana-Vidal、Maxime R. Vitale
DOI:10.1021/acs.orglett.7b00784
日期:2017.5.5
The palladium(0)-catalyzed diastereoselective dearomative cyclopentannulation of 3-nitroindoles with vinylcyclopropanes is described. This straightforward and highly atom-economical method leads to a wide range of functionalized indolines in good yields and diastereoselectivities and represents an unprecedented entry toward the valuable 2,3-fused cyclopentannulated indoline scaffold.
Visible‐Light‐Enabled Multicomponent Cascade Transformation from Indoles to 2‐Azidoindolin‐3‐yl 2‐Aminobenzoates
作者:Ling‐Ling Zhang、Meng‐Meng Xu、Wen‐Bin Cao、Xiao‐Ping Xu、Shun‐Jun Ji
DOI:10.1002/adsc.202000637
日期:2020.8.4
The synthesis of 2‐azido‐1‐benzoylindolin‐3‐yl2‐benzamidobenzoate commencing from (1H‐indol‐1‐yl)(phenyl)methanone and trimethylsilyl azide (TMSN3) under oxygen atmosphere is described in this paper. This transformation proceeds via a sequential dearomatization and ring‐opening cascade reaction of indoles in a cascade manner.
Site-Selective Addition of Maleimide to Indole at the C-2 Position: Ru(II)-Catalyzed C–H Activation
作者:Veeranjaneyulu Lanke、Kiran R. Bettadapur、Kandikere Ramaiah Prabhu
DOI:10.1021/acs.orglett.5b01809
日期:2015.10.2
Synthesis of 3-(indol-2-yl)succinimide derivatives is presented using a directing group strategy. Selective functionalization of C-2 in the presence of highly reactive C-3 in indole derivatives has been achieved. A conjugate addition product instead of Heck-type product has been brought about by careful selection of the alkene partner (maleimides and maleate esters) such that a beta-hydride elimination is avoided.
Metal-free dearomative 2,3-difunctionalization of indoles via radical cascade
作者:Pranesh Pal、Gadela Karteek Goud、Balasubramanian Sridhar、Prathama S. Mainkar、Kiranmai Nayani、Srivari Chandrasekhar