Novel Synthetic Method of 2-(2-Oxoethyl)-1H-indole-3-carbaldehydes
作者:Inga Cikotiene、Rita Buksnaitiene
DOI:10.1055/s-0030-1260317
日期:2011.10
The smooth and regioselective synthesis of 2-(2-oxoethyl)-1H-indole-3-carbaldehydes via silver-catalyzed 6-endo-dig acetalization-cyclization reaction followed by immediate hydrolysis of the unstable 1-alkoxypyrano[4,3-b]indole intermediates is described.
Access to densely functionalized naphthalenes by organobase catalyzed domino reaction of 2-(2-formylaryl)acetophenones with nitroolefins
作者:Anuradha Dagar、Soumen Biswas、Shaikh M. Mobin、Sampak Samanta
DOI:10.1016/j.tetlet.2016.06.062
日期:2016.7
A series of new functionalized naphthalene derivatives having carbonyl and NO2 groups at C-1 and C-3 positions respectively have been prepared in good yields (63–75%) through a one-potdomino reaction of several 2-(2-formylaryl)acetophenonederivatives with a variety of aryl/heteroaryl-substituted 2-nitroolefins in EtOH as a green solvent at 75 °C under air using a catalytic amount of DABCO (30 mol %)
Three-Component Reactions of Isochromenylium Tetrafluoroborates via Non-Classical [4+2]-Intermediates: Mild One-Step Metal-Free Synthesis of Functionalized Dihydronaphthalenes and Tetrahydronaphthalenes
作者:Zhi-Long Hu、Zhen-Yu Yang、Shaozhong Wang、Zhu-Jun Yao
DOI:10.1002/chem.201002317
日期:2011.1.24
Two novel types of elegant three‐component reactions of stable isochromenyliumtetrafluoroborates (ICTBs) have been developed under mild metal‐free conditions in this work. Mechanistically, these reactions are commonly initiated by a [4+2]‐cycloaddition between the non‐classical isochromenylium diene and the aldehyde–enol, and terminated by the following addition of weak nucleophiles, including nitriles