A novel synthesis of indolines by reaction of ortho-nitrophenylmalonates with bis(dimethylamino)methane
作者:Yuri G. Gololobov、Aleхander S. Peregudov、Sergei V. Barabanov、Pavel V. Petrovskii、Victor N. Khrustalev
DOI:10.1016/j.tetlet.2011.09.145
日期:2011.12
We report here a new and efficient synthesis of substituted indolines via reaction of dimethyl 2,4-dinitrophenyl-(2,4,6-trinitrophenyl)malonates with bis(dimethylamino)methane.
A direct entry to the 1-methoxyindole skeleton and to the corresponding indoles by a novel rearrangement: general syntheses of substituted 1-methoxyindoles
A short and efficient route to 1-methoxyindoles via a novel rearrangement is disclosed. This route involves only three steps from commercially available nitro compounds. The methodology is also generalized with a variety of examples to afford a series of 2-substituted-1-methoxyindoles possessing an electron-withdrawing group at position 3. In addition, a 1-methoxyindole compound 10 was converted to
Synthesis of 2-(2,6-Dinitrophenyl)malonates, -acetates and acetonitrile by Copper-Mediated Vicarious Nucleophilic Substitution
作者:Olof Haglund、Martin Nilsson
DOI:10.1055/s-1994-25447
日期:——
A regioselective, vicarious nucleophilic substitution of 1,3-dinitrobenzene with α-bromo- and iodocarbanions proceeds in the presence of copper(I) tert-butoxide and pyridine giving 2,6-dinitrophenylmalonates, 2,6-dinitrophenylacetates or 2,6-dinitrophenylacetonitrile as the only isomers from bromomalonate esters, bromoacetate esters, iodoacetate esters or iodoacetonitrile, respectively. Without copper(I) tert-butoxide, the 4-substituted isomer is the only product. We believe that the reaction proceeds via a Ï-adduct of 1,3-dinitrobenzene and halocarbanion from which hydrogen and halogen are eliminated. This elimination is dependent upon the concentration of copper(I) tert-butoxide.