Chemical Identity and Structure

4-Cyanopiperidine-1-sulfonyl chloride (Aladdin SKU C173844) is a heterocyclic sulfonyl chloride reagent. Its molecular framework consists of a six-membered piperidine ring bearing a cyano (–CN) substituent at the 4-position and a sulfonyl chloride (–SO₂Cl) group attached to the ring nitrogen at the 1-position.

The molecule is therefore bifunctional: the sulfonyl chloride moiety acts as a potent electrophile toward nucleophiles, while the nitrile group offers additional synthetic handles—it can be hydrolyzed to a carboxylic acid, reduced to an amine, or converted to a tetrazole, all of which are transformations of medicinal relevance.

This combination of a saturated, sp³-rich piperidine core with two orthogonal reactive groups makes the compound a versatile intermediate for fragment-based drug discovery and lead optimization campaigns.

Handling, Safety, and Storage

Personal Protective Equipment (PPE): Always handle 4-cyanopiperidine-1-sulfonyl chloride in a well-ventilated fume hood. Wear chemical-resistant gloves (nitrile or neoprene), laboratory coat, and safety glasses or a face shield. The sulfonyl chloride functionality is lachrymatory and corrosive; HCl vapor may be released upon contact with atmospheric moisture.

Moisture Control: Because sulfonyl chlorides react rapidly with water—yielding the corresponding sulfonic acid and HCl—all glassware, syringes, and solvents should be thoroughly dried before use. Reactions should be set up under an inert atmosphere (N₂ or Ar) using standard Schlenk or glovebox techniques where prolonged exposure is anticipated.

Storage: Store the compound tightly sealed in its original container in a cool, dry location away from moisture and protic solvents. An inert-gas blanket over the solid is recommended for long-term preservation of reagent quality. Refrigeration (2–8 °C) may extend shelf life; consult the Certificate of Analysis for lot-specific stability data.

Disposal: Quench excess reagent carefully with ice-cold water or dilute aqueous base in a fume hood; dispose of the resulting aqueous waste according to local regulations for chlorine-containing chemical waste. Never pour neat sulfonyl chloride into drains.

Synthetic Applications and Reaction Protocols

Sulfonamide Formation (Primary Application): 4-Cyanopiperidine-1-sulfonyl chloride reacts with primary and secondary amines to furnish sulfonamides bearing the 4-cyanopiperidine pharmacophore. A general protocol involves dissolving the sulfonyl chloride (1.0 equiv) in anhydrous dichloromethane (DCM) or tetrahydrofuran (THF), adding the amine nucleophile (1.1–1.5 equiv) and a base such as triethylamine or N,N-diisopropylethylamine (DIPEA, 2.0 equiv) at 0 °C, then allowing the reaction to warm to room temperature. Reaction times typically range from 30 minutes to several hours depending on the amine nucleophilicity. Work-up involves aqueous wash (saturated NaHCO₃, then brine), drying over MgSO₄ or Na₂SO₄, and concentration in vacuo.

O-Sulfonylation: Alcohols and phenols can also react with sulfonyl chlorides under basic conditions to give sulfonate esters, though this pathway is generally less common for synthetic applications compared with N-sulfonylation. For selective N-sulfonylation in the presence of hydroxyl groups, careful control of temperature and stoichiometry is advised.

Nitrile Post-Functionalization: After sulfonamide bond formation, the pendent nitrile group can be elaborated further. Hydrolysis (acid or base conditions) affords the corresponding carboxylic acid; reduction with LiAlH₄ or DIBAL-H provides the amine; [3+2] cycloaddition with sodium azide yields the 5-substituted tetrazole—a bioisostere of carboxylic acids widely exploited in medicinal chemistry.

Recommended Solvents: DCM, THF, acetonitrile, and DMF are suitable. Avoid protic solvents (MeOH, EtOH, water) in the sulfonylation step to minimize hydrolysis of the sulfonyl chloride.

Quality, Purity, and Specification Guidance

When ordering 4-cyanopiperidine-1-sulfonyl chloride (C173844), researchers should consult the Certificate of Analysis (CoA) supplied with each lot for purity, appearance, and analytical data (e.g., NMR, HPLC, or GC purity values). As a moisture-sensitive reagent, the purity reported on the CoA reflects the material quality at the time of manufacture; degradation can occur if the compound is improperly stored or the container is repeatedly opened without inert-atmosphere precautions.

Inspect the compound visually before use: pure sulfonyl chloride reagents are typically colorless to pale yellow solids or liquids. Discoloration, fuming, or an unusually pungent odor may indicate partial hydrolysis or decomposition. In such cases, reagent quality should be assessed by ¹H NMR or HPLC before critical synthetic steps.

For procurement and lead-time inquiries regarding C173844, contact Aladdin Scientific customer service. Custom quantities and bulk orders may be available upon request.

Regulatory and Documentation Considerations

Safety Data Sheet (SDS): A full SDS for 4-cyanopiperidine-1-sulfonyl chloride should be obtained from Aladdin Scientific prior to first use and reviewed by all laboratory personnel who will handle the compound. The SDS provides GHS hazard classifications, first-aid measures, fire-fighting procedures, and spill-handling guidance specific to this reagent.

GHS Classification Considerations: Sulfonyl chlorides are generally classified as corrosive and irritant substances under GHS. The presence of the nitrile group may add an acute toxicity designation depending on jurisdictional classification criteria. Users should verify the current GHS classification on the SDS for lot C173844.

Transport: Depending on quantity and jurisdiction, this compound may be subject to regulations for corrosive materials under IATA (air freight) or DOT/ADR (road transport) classifications. Confirm packaging group and UN number with Aladdin Scientific logistics before shipping.

Export Control: Researchers should verify whether the compound is subject to export-control regulations in their country before international transfer.