| abstract |
Process for the preparation of indoles, characterised in that at least one arylhydrazone in liquid or dissolved form is mixed with at least one catalyst in liquid or dissolved form in at least one, optionally heatable microreactor and reacted for a residence time, and the indole compound obtained in this way is, if desired, isolated from the reaction mixture, the catalyst empolyed being an inorganic acid, an organic acid, a Lewis acid, or a mixture of at least two of these catalysts. |