Introduction
1-Boc Piperazine (1-tert-Butoxycarbonylpiperazine) is a widely used chemical intermediate in organic synthesis, particularly within the pharmaceutical and biotech industries. With a protected piperazine core, it serves as a versatile compound in the development of drug candidates, bioactive molecules, and custom chemical scaffolds. The Boc (tert-butoxycarbonyl) protecting group offers selective reactivity and stability, making 1-Boc Piperazine ideal for multi-step synthesis.
Chemical Overview
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Chemical Name: 1-(tert-Butoxycarbonyl)piperazine
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Molecular Formula: C9H18N2O2
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Molecular Weight: 186.25 g/mol
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CAS Number: 57260-71-6
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Structure: Piperazine ring with one nitrogen substituted by a Boc group
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Appearance: White to off-white crystalline solid
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Solubility: Soluble in methanol, ethanol, dichloromethane, and most polar organic solvents
The piperazine moiety is common in many drugs due to its favorable pharmacokinetic and receptor-binding properties, while the Boc group offers controlled protection for selective reactions.
Applications of 1-Boc Piperazine
1. Pharmaceutical Intermediate
1-Boc Piperazine plays a critical role in the synthesis of active pharmaceutical ingredients (APIs). It is frequently used in the preparation of:
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Antipsychotic drugs
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Antidepressants
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Anti-inflammatory agents
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Anticancer molecules
By protecting one of the nitrogen atoms on the piperazine ring, it allows for controlled modification of the other, which is essential in stepwise drug synthesis.
2. Medicinal Chemistry & Lead Optimization
In drug discovery and medicinal chemistry, 1-Boc Piperazine is commonly incorporated into combinatorial libraries for screening biological activity. The piperazine scaffold is highly valued for:
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Enhancing water solubility
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Improving membrane permeability
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Acting as a bioisostere for amines or peptides
The Boc group can be easily removed using acid (e.g., TFA), providing flexibility in late-stage functionalization.
3. Peptidomimetic Design
Piperazine-based compounds like 1-Boc Piperazine are often used in the design of peptidomimetics. These are compounds that mimic peptide structures but are more stable and resistant to enzymatic degradation. 1-Boc Piperazine helps in creating:
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Enzyme inhibitors
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Receptor antagonists
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Molecular probes
This application is particularly important in the development of drugs targeting GPCRs, kinases, and enzymatic pathways.
Safety and Handling
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Hazard Classification: Low; may cause irritation upon direct contact
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Handling Precautions: Use appropriate PPE (gloves, goggles); handle in a fume hood if large volumes are used
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Storage Conditions: Store in a tightly sealed container, away from strong acids and heat sources; recommended storage temperature: below 25°C
Packaging and Availability
1-Boc Piperazine is available in:
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Lab Packs: 5g, 25g, 100g
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Bulk Quantities: 500g, 1kg, 5kg, and customized packaging on request
All batches come with COA, MSDS, and batch-specific documentation. Shipping is available worldwide.
Conclusion
1-Boc Piperazine is a strategically important intermediate in modern chemical synthesis, especially for pharmaceutical applications. Its combination of a reactive piperazine ring and a removable Boc group makes it a go-to building block for chemists involved in drug discovery, peptide chemistry, and heterocycle design. Its ease of use, stability, and broad reactivity spectrum continue to make it a valuable compound in both research and commercial manufacturing.
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