Buchwald–Hartwig amination, record ord-07751cbdbcad4c89bdfeeea3a04ddb39
One recorded run of this reaction. Below is what the source recorded, and nothing added to it.
What was in the flask
| Role | Species | Formula | Yield |
|---|---|---|---|
| Reactant | 2,4-Dichloropyrimidine | C₄H₂Cl₂N₂ | |
| Reactant | Benzenesulfonamide, 3-amino- | C₆H₈N₂O₂S | |
| Reagent | Cesium carbonate | CCs₂O₃ | |
| Catalyst | 1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine) | C₃₉H₃₂OP₂ | |
| Catalyst | Palladium (II) acetate | C₄H₈O₄Pd | |
| Solvent | 1,4-Dioxane | C₄H₈O₂ | |
| Product | 3-[(4-Chloropyrimidin-2-yl)amino]benzenesulfonamide | C₁₀H₉ClN₄O₂S | 2% |
Conditions
- Temperature
- 150 °C
Yield
- 2% of 3-[(4-Chloropyrimidin-2-yl)amino]benzenesulfonamide.
Procedure
Copied from the source record, unedited
2,4-dichloropyrimidine (200 mg, 1.34 mmol), 3-aminobenzenesulfonamide (231 mg, 1.34 mmol), (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (93 mg, 0.16 mmol), cesium carbonate (875 mg, 2.68 mmol) and diacetoxypalladium (15.07 mg, 0.07 mmol) were suspended in dioxane (5 mL) and sealed into a microwave tube. The reaction was heated to 150 °C for 30 minutes in the microwave reactor and cooled to RT. The reaction mixture was diluted with EtOAc (150 mL) and washed with water (150 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford crude product. The crude product was purified by flash silica chromatography, elution gradient 0 to 4% (10:1 MeOH/NH3 (aq)) in DCM. NMR analysis showed a trace amount of product.
The source
This record comes from experimental reaction archive (ord-07751cbdbcad4c89bdfeeea3a04ddb39). Open the source and check it against what is on this page.
experimental reaction archive record ord-07751cbdbcad4c89bdfeeea3a04ddb39 from dataset "750 AstraZeneca ELN dataset" (url: https://chemrxiv.org/engage/chemrxiv/article-details/60c9e3f37792a23bfdb2d471). No atom mapping is provided by the source.
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.