Hydrochloric Acid → 3-(5-fluoro-1H-indol-3-yl)piperidine-1-carboxylic acid-(4-dimethylamino-4-phenylcyclohexyl)-amide

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Reaction Steps

To prepare the hydrochloride the polar diastereoisomer of 3-(5-fluoro-1H-indol-3-yl)piperidine-1-carboxylic acid-(4-dimethylamino-4-phenylcyclohexyl)-amide (200 mg, 0.43 mmole) was dissolved in ethyl methyl ketone (5 ml) and chlorotrimethylsilane (82 μl, 0.65 mmole) was added. The solid thereby formed was filtered off and dried. The hydrochloride of the polar diastereoisomer of 3-(5-fluoro-1H-indol-3-yl)piperidine-1-carboxylic acid-(4-dimethylamino-4-phenylcyclohexyl)-amide was thereby obtained as a colourless solid with an m.p. of 160°-164° C. in a yield of 215 mg (100%) (Example 42).

Provenance & Evidence