Some synthetic transformations depend less on the complexity of the starting material than on the ability to activate one specific functional group at the right stage of a reaction sequence. N-Phenyl-bis(trifluoromethanesulfonimide), commonly known as PhNTf₂ or Phenyl triflimide, is a specialized reagent developed around exactly this requirement.

As a highly effective trifluoromethanesulfonylating reagent, PhNTf₂ is widely used to convert suitable alcohols, phenols, enolates, and related functional groups into triflate derivatives. These activated intermediates can then participate in substitution, coupling, elimination, and other downstream transformations.

Verified Product Identity

For pharmaceutical and specialty-chemical procurement, accurate chemical identification is essential because several triflimide and triflate reagents have similar names.

N-Phenyl-bis(trifluoromethanesulfonimide) has the following verified characteristics:

CAS Number: 37595-74-7

Molecular Formula: C₈H₅F₆NO₄S₂

Molecular Weight: 357.25 g/mol

IUPAC Name: 1,1,1-Trifluoro-N-phenyl-N-(trifluoromethylsulfonyl)methanesulfonamide

Common Synonyms: PhNTf₂, Phenyl triflimide, N,N-Bis(trifluoromethylsulfonyl)aniline, N-Phenyltrifluoromethanesulfonimide

Appearance: White or colorless crystalline solid

Melting Point: approximately 100–102°C

Storage: sealed, dry conditions, protected from light

NIST independently confirms the CAS number, molecular formula, molecular weight, and molecular structure. The SHLZ Pharma specification reports the same core identity and a melting point of 100–102°C.

The Key Synthetic Function: Triflation

The most important reason chemists use PhNTf₂ is its ability to introduce a trifluoromethanesulfonyl group.

In practical organic synthesis, a hydroxyl-containing substrate may not be reactive enough for a desired substitution or coupling reaction. Conversion of the hydroxyl functionality into a triflate can transform it into a much better leaving group.

This makes PhNTf₂ valuable in reaction sequences involving:

Phenol activation

Enolate triflation

Alcohol-derived triflate chemistry

Heterocycle functionalization

Cross-coupling precursor preparation

Pharmaceutical intermediate synthesis

Patent literature provides direct examples in which PhNTf₂ is used to convert hydroxyl-containing intermediates into triflate derivatives before subsequent synthetic steps.

Compared with treating PhNTf₂ simply as a “fluorine-containing reagent,” this triflation function is the more chemically accurate way to understand its value.

Pharmaceutical Chemistry: From Functional-Group Activation to S1P Receptor Research

PhNTf₂ has documented applications in pharmaceutical synthesis and medicinal chemistry.

Chemical reference data specifically identify its use in the synthesis of sphingosine-1-phosphate receptor agonists, a class of compounds with pharmaceutical relevance.

Patent examples also demonstrate PhNTf₂ in the preparation of intermediates for S1P receptor agonist research, where a hydroxyl-containing aromatic intermediate is transformed into its corresponding triflate derivative using PhNTf₂.

This is particularly relevant when developing complex pharmaceutical molecules because triflate activation can create a useful intermediate for subsequent carbon–carbon or carbon–heteroatom bond formation.

PhNTf₂ should therefore be positioned as a synthetic reagent used within pharmaceutical intermediate routes, rather than described as an active pharmaceutical ingredient.

β-Amino Acid Synthesis Through Enantioselective Mannich Chemistry

Another important application is the preparation of β-amino acids through enantioselective Mannich reactions.

Commercial technical references from Thermo Scientific/Fisher Scientific identify N-Phenylbis(trifluoromethanesulfonimide) as a reagent used in the enantioselective synthesis of β-amino acids through Mannich chemistry.

This application demonstrates a different aspect of PhNTf₂ chemistry. Instead of serving merely as a late-stage activation reagent, it can participate in sophisticated synthetic strategies where stereochemical control and selective functionalization are important.

For pharmaceutical discovery programs, β-amino acids are valuable building blocks for designing peptides, enzyme inhibitors, receptor ligands, and other structurally constrained molecules.

OLED and Electronic-Material Chemistry

PhNTf₂ is also listed as an OLED intermediate and electronic-chemical building block. SHLZ Pharma specifically categorizes the product for OLED-related and pharmaceutical applications.

Its usefulness in this area comes from the broader importance of highly fluorinated sulfonyl chemistry in electronic-material design.

PhNTf₂ can be incorporated into synthetic routes where controlled introduction of trifluoromethanesulfonyl functionality is required. Such chemistry can be relevant to the preparation of specialized organic electronic materials, functional intermediates, and molecular structures used in advanced optoelectronic research.

The appropriate description is therefore OLED intermediate and specialty synthetic reagent, rather than claiming that PhNTf₂ itself is an OLED emitter or active device material.

Relevance to Lithium Battery Electrolytes

The bis(trifluoromethanesulfonyl)imide structural motif is also important in electrolyte and ionic-liquid chemistry.

Patent literature documents the use of N-Phenylbis(trifluoromethanesulfonimide) as an electrolyte additive in lithium secondary battery systems. In one disclosed formulation, PhNTf₂ is combined with lithium salts and other additives as part of a battery electrolyte system.

This application should be distinguished from lithium bis(trifluoromethanesulfonyl)imide itself. PhNTf₂ is not the same compound as LiTFSI. Its role in battery research is that of a functional additive or synthetic component in specific electrolyte formulations.

Research and patent activity therefore supports PhNTf₂ as a relevant material for lithium-battery electrolyte development and fluorinated electronic-chemical research.

A Useful Reagent for Fluorinated Functionalization

The two CF₃SO₂ groups give PhNTf₂ a strongly electron-withdrawing character and make it an effective source of trifluoromethanesulfonyl functionality.

This chemistry is useful when researchers need to transform a relatively unreactive functional group into a strategically activated intermediate.

Its applications can consequently span:

Pharmaceutical synthesis → S1P receptor agonist chemistry → β-amino acid synthesis → OLED intermediates → organic electronics → fluorinated fine chemicals → battery electrolyte research

This breadth explains why PhNTf₂ is often treated as a high-value specialty reagent rather than a conventional bulk chemical.

What Should Buyers Evaluate?

For industrial and R&D procurement, several quality parameters deserve attention.

Chemical identity

The supplier should provide confirmation of CAS 37595-74-7, molecular formula, molecular weight, and analytical identity.

Purity

High-purity material is particularly important for sensitive triflation reactions because trace impurities may affect reaction selectivity and downstream purification.

Moisture and storage

PhNTf₂ should be maintained in sealed, dry conditions and protected from unsuitable environmental exposure. SHLZ Pharma specifies sealed dry storage at room temperature and protection from light.

Batch consistency

For pharmaceutical and electronic-chemical applications, buyers should evaluate not only assay but also relevant impurity profiles, water content, residual solvents, and analytical consistency between batches.

SHLZ Pharma: Supply for R&D and Scale-Up

SHLZ Pharma lists N-Phenyl-bis(trifluoromethanesulfonimide) CAS 37595-74-7 as a regular production product. Its published specification confirms the molecular formula, molecular weight, melting point, appearance, and storage requirements. The company also states that it can support both small samples and larger-volume orders.

For customers developing pharmaceutical intermediates, S1P receptor agonists, β-amino-acid routes, OLED materials, or fluorinated specialty chemicals, this type of supply flexibility can help bridge the gap between laboratory screening and larger-scale process development.

Conclusion

N-Phenyl-bis(trifluoromethanesulfonimide) (PhNTf₂, CAS 37595-74-7) is a versatile fluorinated specialty reagent with a particularly strong role in triflation and trifluoromethanesulfonylation chemistry.

Its documented applications include pharmaceutical intermediate synthesis, S1P receptor agonist chemistry, enantioselective β-amino acid synthesis, OLED-related intermediates, and selected lithium-battery electrolyte systems.

For buyers, the most important considerations are chemical identity, purity, moisture control, analytical consistency, storage, and reliable supply. These factors become increasingly important when PhNTf₂ is incorporated into multi-step pharmaceutical or advanced-material manufacturing routes.