Sertraline is a selective serotonin reuptake inhibitor (SSRI) widely used in the treatment of depression, anxiety disorders, and related conditions. Structurally, it is a substituted tetralin derivative, featuring a fused bicyclic aromatic system, a dichlorinated phenyl ring, and a secondary amine. Its biological activity arises from inhibition of serotonin reuptake, increasing serotonin levels in the synaptic cleft.
Because of its structure, sertraline is commonly discussed in organic chemistry in the context of electrophilic aromatic substitution (EAS), ring construction, stereochemistry (multiple chiral centers), and functional group interconversions.
In the following practice problem, we will focus on the organic synthesis of sertraline rather than its pharmacological properties. Specifically, we will examine how the tetralin framework and substituted aromatic rings can be constructed starting from simple aromatic compounds, using key transformations including electrophilic aromatic substitution, carbonyl condensation reactions, and reduction steps.
The synthesis also highlights the installation of the amine functionality, illustrating strategies such as reductive amination and related C–N bond-forming reactions. The goal is to practice multistep synthesis design while understanding how these reactions are combined to build the rigid bicyclic structure and functionalized aromatic system of sertraline.
As with all examples in this section, this discussion is presented solely for educational purposes and is not intended to represent a practical or real-world method of preparation.
Practice
Add the missing intermediates and reagents in the following synthesis of Sertraline, and draw a plausible mechanism for the conversions 2-3 and 3-4:
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