S-(Difluoromethyl) Benzenesulfonothioate: Key FAQs

S-(difluoromethyl) benzenesulfonothioate is an electrophilic difluoromethylating reagent that enables the introduction of a –CHF₂ group onto nucleophilic substrates, offering researchers a practical tool for the synthesis of difluoromethylated sulfur-containing and other organic compounds.

Product Name

S-(difluoromethyl) benzenesulfonothioate

SKU

B1530087

Functional Group Transferred

Difluoromethyl (–CHF₂)

Reagent Class

Electrophilic difluoromethylation reagent

Core Scaffold

Benzenesulfonothioate (PhS(O)₂S–)

Supplier

Aladdin Scientific (SKU B1530087)

What Is S-(Difluoromethyl) Benzenesulfonothioate?

S-(Difluoromethyl) benzenesulfonothioate is an organosulfur compound belonging to the sulfonothioate family. Its structure features a benzenesulfonyl group (PhSO₂–) connected via a sulfur–sulfur bond to a difluoromethyl group (–CHF₂), giving the overall connectivity PhS(O)₂S–CHF₂. This architecture makes the –CHF₂ fragment electrophilically activated and susceptible to transfer to a range of nucleophiles under mild conditions.

The difluoromethyl group (–CHF₂) is of significant interest in medicinal chemistry, agrochemical research, and materials science because it can act as a lipophilic hydrogen-bond donor, modulate pKa values, and improve metabolic stability relative to unmodified analogues. Reagents that reliably install –CHF₂ onto diverse substrates are therefore in high demand in both academic and industrial research settings.

Mechanism and Reactivity

The reagent acts as an electrophilic source of the difluoromethyl group. The sulfonothioate linkage (–S(O)₂S–) weakens the S–CHF₂ bond, rendering the carbon electrophilic. When a sulfur, nitrogen, oxygen, or carbon nucleophile attacks this carbon, the benzenesulfinate anion (PhSO₂⁻) departs as a leaving group, and the nucleophile acquires the –CHF₂ moiety.

This electrophilic difluoromethylation mode is complementary to radical and nucleophilic difluoromethylation strategies. The benzenesulfonothioate scaffold is chosen because it balances electrophilicity at the CHF₂ carbon with adequate stability for storage and handling. Typical substrates include thiolates, amines, phenols, and stabilised carbanions, though researchers should conduct preliminary reactivity screens for each new substrate class.

Handling, Storage, and Safety

As with all reactive organosulfur reagents, appropriate personal protective equipment (PPE) — including nitrile gloves, safety glasses, and a laboratory coat — should be worn when handling S-(difluoromethyl) benzenesulfonothioate. Work should be performed in a well-ventilated fume hood to avoid inhalation of any vapours.

Storage recommendations for reagents of this class typically include cool, dry conditions away from moisture, strong oxidisers, and bases. The exact recommended storage temperature, GHS hazard classification, and shelf life for SKU B1530087 should be confirmed from the current Safety Data Sheet (SDS) available on the Aladdin Scientific product page. Researchers should consult the SDS before use and comply with all applicable local regulations for handling fluorinated organosulfur compounds.

Applications in Research

S-(Difluoromethyl) benzenesulfonothioate is primarily used as a building-block reagent in synthetic organic chemistry workflows that require introduction of the –CHF₂ group. Key application areas include:

• Medicinal chemistry: Preparation of difluoromethylated drug candidates and reference standards where –CHF₂ serves as a bioisostere of –CF₃, –OCH₃, or –SH groups.
• Agrochemical synthesis: Construction of fluorinated pesticide or herbicide intermediates.
• Probe and tracer development: Synthesis of fluorine-labelled molecular probes for biological studies.
• Methodology development: Evaluation of new catalytic or base-mediated difluoromethylation protocols.

The reagent is suitable for laboratory-scale synthesis. Scale-up considerations should be evaluated by qualified chemists with reference to current safety data.

Ordering and Product Specifications

S-(Difluoromethyl) benzenesulfonothioate is available from Aladdin Scientific under SKU B1530087. To obtain the most current information on available pack sizes, purity specifications, pricing, and lead times, please visit the Aladdin Scientific website or contact our customer service team directly.

Researchers requiring a Certificate of Analysis (CoA), Safety Data Sheet (SDS), or nuclear magnetic resonance (NMR) or high-performance liquid chromatography (HPLC) data for lot-release qualification should submit a request through the product page or via email to our technical support team. Bulk or custom quantities may be available; inquire with our sales team for details.

Frequently asked questions

What type of reagent is S-(difluoromethyl) benzenesulfonothioate and how does it work?

S-(Difluoromethyl) benzenesulfonothioate is an electrophilic difluoromethylation reagent. It transfers the –CHF₂ group to nucleophilic substrates (such as thiolates, amines, or phenols) by S–C bond cleavage, releasing the benzenesulfinate anion as a leaving group. This makes it a versatile tool for installing the difluoromethyl moiety in synthetic chemistry workflows.

What are the typical applications of S-(difluoromethyl) benzenesulfonothioate in research?

This reagent is primarily used in medicinal chemistry for synthesising –CHF₂-bearing drug candidates and bioisosteric analogues, in agrochemical research for building fluorinated intermediates, and in methodology studies for evaluating new difluoromethylation protocols. It is also applied in the preparation of fluorine-labelled molecular probes for biological research.

How should S-(difluoromethyl) benzenesulfonothioate (SKU B1530087) be stored?

General best practice for reagents of this class is to store them under cool, dry conditions, away from moisture, strong oxidisers, and bases. The exact storage temperature and conditions specific to SKU B1530087 should be confirmed from the current Safety Data Sheet (SDS) available on the Aladdin Scientific product page, as specifications can vary by lot.

Is S-(difluoromethyl) benzenesulfonothioate compatible with aqueous reaction conditions?

Sulfonothioate-based electrophilic reagents may be susceptible to hydrolysis under strongly aqueous or protic conditions; therefore, anhydrous or predominantly organic solvent systems are generally preferred. Researchers should perform solvent compatibility screening for their specific substrate and conditions. Exact hydrolytic stability data for B1530087 should be verified experimentally or sourced from the product SDS.

How do I request a Certificate of Analysis or Safety Data Sheet for SKU B1530087?

Certificates of Analysis (CoA) and Safety Data Sheets (SDS) for SKU B1530087 can be requested directly through the product page on the Aladdin Scientific website or by contacting our customer service and technical support teams via email. Please have your lot number ready when making the request to ensure you receive the correct documentation.

References

1. Moochun Biotechnology Co., Ltd. Product list reference for S-(difluoromethyl) benzenesulfonothioate. Retrieved from http://www.moochun-bio.com/cn/products/List-5.html
2. Aladdin Scientific product page for S-(difluoromethyl) benzenesulfonothioate, SKU B1530087. Aladdin Scientific.

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.