Skip to the content
Browse the library

Buchwald–Hartwig amination: 1,3-dimethyl-1H-pyrazol-4-amine dihydrochloride → 2-(5-chloro-2-(1,3-dimethyl-1H-pyrazol-4-ylamino)pyridin-4-ylamino)-4-fluoro-N-methylbenzamide

4% yield, run at 100 °C, as recorded by experimental reaction archive. The written procedure is below.

verified record, 4% yield recorded, Not balanced as written, From experimental reaction archive

Reagents, catalysts and solvents are in the table below.

The atoms, from reactants to products

CNCOCCCCFCCNCCCNCCNCNCCNCCClClClCl
Reactants · 1/6
breakingformingbond order changesmapped atom that changes

Drawn from the record's atom map: which bonds break and which form between the reactants and products the source listed. It shows a change in connectivity, not a simulated trajectory and not a mechanism.

What was in the flask

RoleSpeciesFormulaYield
Reactant1,3-dimethyl-1H-pyrazol-4-amine dihydrochlorideC₅H₁₁Cl₂N₃—
Reactant2-(2,5-dichloropyridin-4-ylamino)-4-fluoro-N-methylbenzamideC₁₃H₁₀Cl₂FN₃O—
ReagentCesium carbonateCCs₂O₃—
Catalyst1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)C₃₉H₃₂OP₂—
CatalystPalladium (II) acetateC₄H₈O₄Pd—
Solvent1,4-DioxaneC₄H₈O₂—
Product2-(5-chloro-2-(1,3-dimethyl-1H-pyrazol-4-ylamino)pyridin-4-ylamino)-4-fluoro-N-methylbenzamideC₁₈H₁₈ClFN₆O3.92%

The equation does not balance as written. That is usual for an experimental record: the source listed what it put in and what it measured, not a stoichiometric equation.

Conditions

Temperature
100 °C

Only the dimensions the source stated are listed. Anything absent here was not recorded, and it is not inferred from what the class usually needs.

Yield

  • 4% of 2-(5-chloro-2-(1,3-dimethyl-1H-pyrazol-4-ylamino)pyridin-4-ylamino)-4-fluoro-N-methylbenzamide.

Procedure

Copied from the source record, unedited

2-(2,5-dichloropyridin-4-ylamino)-4-fluoro-N-methylbenzamide (165 mg, 0.53 mmol), 1,3-dimethyl-1H-pyrazol-4-amine dihydrochloride (193 mg, 1.05 mmol), cesium carbonate (376 mg, 1.16 mmol), (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (48.6 mg, 0.08 mmol) and diacetoxypalladium (9.43 mg, 0.04 mmol) were suspended in dioxane (3 mL) and sealed into a tube. The reaction was degased, purged with nitrogen and heated to 100 °C for 16 hours => _reaction not complete._ (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine), diacetoxypalladium and cesium carbonate were added. The reaction was degased, purged with nitrogen and heated to 110 °C for 4 hours => _reaction still not complete, no progress ..._ Reaction was filtered, washed with CH2Cl2 and concentrated to dryness. The react

The source

This record comes from experimental reaction archive (ord-96575886127b4df4af262fbd2602568c). Open the source and check it against what is on this page.

  • experimental reaction archive record ord-96575886127b4df4af262fbd2602568c from dataset "750 AstraZeneca ELN dataset" (url: https://chemrxiv.org/engage/chemrxiv/article-details/60c9e3f37792a23bfdb2d471). No atom mapping is provided by the source.

    experimental record · quality medium · source

experimental reaction record.

How to read this record

This is one experiment, not a rule. It says that on one occasion these species were combined under these conditions and this came out. It does not say the reaction will give the same result on your substrate, and nothing on the page has been generalised into a claim that it would.

The pathway is a separate question, kept on separate pages. A mechanism here is the canonical arrow pushing for a class, run on real structures and labelled rule-derived. It is not evidence, and this record is not a mechanism.