The syntheses were carried out according to a general scheme: reaction of ketocarbazoles (XXII) with primary amines yielded l-iminotetrahydrocarbazoles (XIIi-XXi),* which were reduced to amino compounds XII-XX. Some of the iminotetrahydrocarbazoles were isolated in the form of their hydrochlorides (Table i). Reductions of the hydrochlorides and the free basis proceed under the same conditions: in ethanol at room temperature with an ...
