Synthesis of chromenoimidazocarbolines by a reaction of quaternary iminium salts with o-hydroxybenzaldehydes
It was shown that the interaction of N2-(cyanomethyl)-β-carbolinium bromide with o-hydroxybenzaldehydes in the presence of ammonium acetate upon refluxing in ethanol proceeded as a domino reaction and led to the formation of chromenoimidazocarbolines
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