155593-11-6Relevant articles and documents
Synthesis of 2-(2,6-dinitrophenyl)malonates, -acetates and acetonitrile by copper-mediated vicarious nucleophilic substitution
Haglund,Nilsson
, p. 242 - 243 (1994)
A regioselective, vicarious nucleophilic substitution of 1,3- dinitrobenzene with α-bromo- and iodocarbanions proceeds in the presence of copper(1) 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 σ-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.
Unexpected formation of the arcyriacyanin system by condensation of a 3-bromo-4-(indol-3-yl)maleimide with (2-nitrophenyl)acetates
Mayer, Guido,Hinze, Claudia,Polborn, Kurt,Steglich, Wolfgang
, p. 625 - 628 (2007/10/03)
The reaction of an N-protected 3-bromo-4-(indol-3-yl)maleimide with methyl (2-nitrophenyl)acetates in the presence of base affords condensed cycloheptatriene derivatives which can be transformed into arcyriacyanin-type alkaloids. The unusual reaction sequ