1: 2,3,3-trimethyl-(3H)-indoleine; methyl iodide in acetonitrile 3 h; RefluxInert atmosphere; 2: With potassium hydroxide in water T=20°C; 0.166667 h; 3: 3,5-dinitro-2-hydroxybenzaldehyde in ethanol T=20°C; 15 h; RefluxInert atmosphere;

in ethanol 0.0833333 h; Irradiation;

in ethanol 0.25 h; Irradiation;

in ethanol Heating;

in water; acetonitrile T=25°C; Darkness; Equilibrium constant; Temperature;