Suzuki reaction troubleshooting

Fix the problem one check at a time.

Choose what happened, check the most likely cause, then change one thing. Use the condition helper only when you need a new set of starting conditions.

Step 1

What happened?

Choose the clearest thing you observed. If possible, use NMR or MS to confirm what the spot or peak actually is.

Find the closest result

Step 2

Choose a starting condition set.

Pick the options that best match your reaction. Treat the result as a small screen, not a guaranteed recipe.

Electrophile reactivity guide
Ar–I›Ar–OTf›Ar–Br≫Ar–Cl

Corrected from the earlier helper: I > OTf > Br ≫ Cl is a general guide, not a universal rate law. Triflates can hydrolyze under aqueous base, and substrate, ligand, solvent, and catalyst speciation can reverse practical outcomes.

Complete dataset

Browse all 132 failure modes.

Filter by family or search any observed result, reason, check, or fix. Open an item only when you need the technical detail.

Reference

Sources and limits

Primary reviews and teaching-lab reports come first. Vendor troubleshooting guides are clearly marked as lower-authority support.

How to read the recommendations

The expanded dataset contains 132 failure modes across 12 families, indexed through 29 observable results. “Ranked” means qualitative best fit to the selected symptom—not measured probability. Confirm the proposed side product before changing conditions.

Primary review / journal article Teaching procedure / instructor notes Vendor troubleshooting · cross-check

Evidence caveats

The most detailed symptom-to-cause maps come from about 45 BenchChem vendor notes. They are marked as lower-authority support; vendor-, forum-, tertiary-, and trade-press-only items should be treated as provisional. Chemistry StackExchange and Reddit troubleshooting threads were not retrievable in the research pass.

10 flagged tensions

Where sources disagree

Open a topic to see both positions and the working resolution used in the app.

PRIMARY REVIEW

Selection of boron reagents for Suzuki–Miyaura coupling

Lennox & Lloyd-Jones, Chemical Society Reviews (2014). Basis for protodeboronation, transmetalation, masking, and slow-release strategies.

Read at RSC
TEACHING PROCEDURE

Suzuki cross-coupling reactions: synthesis of unsymmetrical biaryls

Callam & Lowary teaching-lab procedure. Supports inert setup, TLC monitoring, workup, filtration, and student-facing safety notes.

Open teaching protocol
JOURNAL ARTICLES

Teaching-lab and scale-up observations

Deveau et al., J. Chem. Educ. 2012, DOI 10.1021/ed200212p; Diflunisal experiment, DOI 10.1021/acs.jchemed.5c01060; 50 kg manufacturing lessons, DOI 10.1021/acs.oprd.5c00207.

VENDOR GUIDE · LOWER AUTHORITY

Sluggish or incomplete Suzuki coupling

Detailed palladium-black, oxygen, ligand-ratio, and mixing symptom map. Used only where consistent with the literature review.

Open guide
VENDOR GUIDE · LOWER AUTHORITY

Homocoupling in Suzuki reactions

Basis for oxygen-mediated homocoupling, Pd(II) activation, degassing workflows, slow addition, and sacrificial reduction options.

Open guide
VENDOR GUIDE · LOWER AUTHORITY

Preventing palladium black formation

Supports aggregation/deactivation logic and the roles of heat, oxygen, and ligand coverage.

Open guide

Scope: Educational planning aid for trained laboratory users. It does not replace a supervisor-approved procedure, substrate-specific literature, risk assessment, SDS review, or institutional waste rules. Palladium waste belongs in the designated heavy-metal stream; solvent and ligand hazards vary by condition.