An efficient method for the synthesis of 4‐aminotetrahydrocarbazole derivatives from 2,3‐dihydrospiro‐[1H‐carbazole‐1,2′‐(1,3)‐dithiolan]‐4‐(9H)‐one 1 is described. The structure of compound 6 has been confirmed by X‐ray structure analysis.
The title compound, C15H17NO2, consists of a tetrahydrocarbazole skeleton with a carboxyethyl group at position 3. Molecules are linked about inversion centres by N—H⋯O hydrogen bonds [N⋯O 2.908 (4) Å] to form centrosymmetric dimers.
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