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A 2024 study reports a way to redirect familiar Suzuki–Miyaura starting materials toward diaryl amines instead of biaryls. The key is a formal nitrogen-insertion step: with an added nitrogen reagent and tuned palladium–phosphine catalyst, the reaction forms a C–N–C linkage where a conventional Suzuki coupling would form a C–C bond. It is a distinct, condition-dependent reaction—not a standard Suzuki reaction that changes products on its own.
What “rerouting” a cross-coupling reaction means
Conventional Suzuki–Miyaura coupling joins an aryl electrophile and an organoboron partner to make a biaryl: two aromatic groups connected directly by a carbon–carbon bond. In the aminative variant reported by Polpum Onnuch, Kranthikumar Ramagonolla, and Richard Y. Liu in Science in 2024, a formal NH insertion diverts that pathway, producing a diaryl amine in which nitrogen sits between the two aryl groups.
The idea is useful because the starting-material classes are familiar to cross-coupling chemists, while the product scaffold changes. But the nitrogen reagent and a specifically tuned palladium catalyst system are essential parts of the reported method.
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| Feature | Conventional Suzuki–Miyaura | Aminative Suzuki–Miyaura |
|---|---|---|
| Product linkage | Biaryl C–C bond | Diaryl amine C–N–C linkage |
| Starting-material classes | Aryl electrophile and organoboron partner | Reportedly the same classes, plus an electrophilic nitrogen reagent |
| Catalyst and conditions | Not specified here; conventional Suzuki conditions are not interchangeable with the aminative method | Palladium with a bulky phosphine ligand and reaction-specific conditions, including base |
| What the evidence establishes | Established cross-coupling reaction | Laboratory scope and diversification examples; no large-scale or manufacturing performance dataset is reported in the sources cited |
The primary paper describes aryl chlorides, bromides, triflates, and tosylates as electrophile classes, with boronic acids or esters as coupling partners. It reports compatibility across a range of functional groups and heterocycles relevant to medicinal chemistry, while noting that conditions may need adjustment for different substrate classes. The primary study gives the experimental scope and conditions.
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What the reported results show—and what they do not
Performance varies by substrate. In an optimized model reaction, Onnuch and colleagues reported 96% yield after 12 hours with t-BuBrettPhos-modified palladium, with only trace Suzuki product. That figure belongs to that specific example and condition set; it is not a general yield expectation.
A primary-alcohol-containing substrate gave 36% yield, and the authors discuss possible competing side reactions in that case. This is a useful counterpoint to broad compatibility claims: scope means the method works across a range, not that every substrate performs equally well.
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The authors also demonstrated late-stage diversification, including a modified Etoricoxib intermediate obtained in 50% yield on a 1-mmol scale. Such examples show that the transformation can alter complex molecules in a laboratory setting. They do not demonstrate therapeutic benefit, improved medicines, or manufacturing readiness.
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The reaction has to manage competing demands: Suzuki coupling is efficient, so the system must slow or divert that pathway enough for nitrogen insertion to occur while still enabling formation of the second carbon–nitrogen bond. The paper discusses issues such as premature reaction of the amination reagent, homocoupling, and other competing pathways.
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The authors consider both an “electrophile-first” and a “nucleophile-first” route to C–N bond formation. The evidence supports substrate-dependent possibilities rather than one universal sequence. Chemistry World’s 2024 account notes that establishing which route a given substrate favors remains an open question. Chemistry World’s report also includes comments from the corresponding author and other chemists on the method’s potential.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Extensions beyond diaryl amines
The same broader design idea—insert an atom or group into a cross-coupling pathway—has precedents such as carbonylative Stille coupling, but systematic heteroatom insertion is less explored. The 2024 paper reports two early extensions:
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- A tandem NH and carbonyl insertion that produced an amide in 55% yield in one example.
- An aminative Tsuji–Trost allylation demonstration under unoptimized conditions.
These are demonstrations, not evidence that every cross-coupling can be redirected by the same strategy. The authors position further reaction classes as prospective work.
Why chemists may care
Cross-coupling methods have expanded through strategies including fluorination, trifluoromethylation, alkyl-electrophile C–C coupling, reductive cross-electrophile coupling, and C–H activation. Aminative Suzuki–Miyaura coupling adds a different option: repurpose recognizable aryl electrophile and organoboron partners to access a nitrogen-containing scaffold through a diverted pathway.
That matters particularly in medicinal chemistry, where aromatic amines are common structural motifs. The reaction offers an alternative synthetic disconnection for making them, but deciding whether it is suitable for a particular molecule still depends on substrate behavior, selectivity, and the required conditions. The reported examples establish a promising laboratory method, not a universal replacement for existing amination routes.
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