The Curtin–Hammett principle in action: 1-amino-3H-isoindole in cycloaddition reactions

Reaction of 1-aminoisoindole with 1,4-naphthoquinone and study of the product by spectroscopic methods

In our previous researches we have shown, that 1-aminoisoindole, which exists predominantly in isoindoline tautomeric form, can undergo [4+2]-cycloaddition reactions with maleimides according to the Curtin-Hammet principle. We continued to study this reaction, but with another dienophile – 1,4-naphtoquinone. In this case, the reaction does not stop when the bis-Michael adduct is obtained, but continues with the formation of a more complex compound, the structure of which we have studied by two-dimensional NMR spectroscopic methods.

Rh(iii)-catalyzed C–H activation reactions forming 1H-isoindoles containing a quaternary carbon center from aryl ketones or benzylamines

Rh(iii)/Cu(OAc)₂ catalyzed, one-pot reactions of aryl ketones, acrylate esters and ammonium acetate or α-substituted benzylamines under microwave irradiation conditions produce 1H-isoindoles bearing a quarternary carbon center.

Synthesis and Fluorescence Properties of 4-aminobenzo[f]Isoindole Derivatives

We report a new route to benzo[ f]isoindole derivatives that possess strong fluorescence. The structure of the newly synthesised compounds was confirmed by NMR, IR and mass spectra, along with X-ray crystallographic studies. Absorption and fluorescence spectra of the new compounds were recorded. It was established that tautomerism of 4-aminobenzo[ f]isoindoles defines the properties of these compounds. Also, the influence of substituents at the N-2 position on the luminescence properties was studied; the fluorescence intensity is dependent on the water content in organic solvents, and can be used to indicate their moisture content.