Alternative Approach to Synthesis of 3-(4-chloro butyl)-<i>1H</i>-indole-5-carbonitrile: A Key Intermediate of Vilazodone Hydrochloride, an Antidepressant Drug

<div><p></p><p>An alternative and efficient telescopic approach to the synthesis of 3-(4-chloro butyl)-<i>1H</i>-indole -5-carbonitrile (<b>2</b>), a key intermediate in the synthesis of vilazodone hydrochloride (<b>1</b>), is described.</p> </div>