Investigation of the reaction product of certain 3- [2- [bromophenyl] -2-oxoethylidene] -1,3-dihydro-2Hindol-2-ones with some nucleophiles

The addition of some nucleophilic reagents to certain 3-[2-[3- or 4-bromophenyl]-2-oxo-ethylidene]-1,3-dihydro-2H-indolones VIa-j was investigated. The anomalous behavior observed during the addition of phenylhydrazine or hydroxylamine indicated a Michael reaction. The structures of the products were established on the basis of their elemental and spectral analyses. A discussion of the experimental findings was presented